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a2fb1b05 ILT |
1 | // output.cc -- manage the output file for gold |
2 | ||
e29e076a | 3 | // Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
6cb15b7f ILT |
4 | // Written by Ian Lance Taylor <iant@google.com>. |
5 | ||
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
a2fb1b05 ILT |
23 | #include "gold.h" |
24 | ||
25 | #include <cstdlib> | |
04bf7072 | 26 | #include <cstring> |
61ba1cf9 ILT |
27 | #include <cerrno> |
28 | #include <fcntl.h> | |
29 | #include <unistd.h> | |
30 | #include <sys/mman.h> | |
4e9d8586 | 31 | #include <sys/stat.h> |
75f65a3e | 32 | #include <algorithm> |
6a89f575 | 33 | #include "libiberty.h" |
a2fb1b05 | 34 | |
7e1edb90 | 35 | #include "parameters.h" |
a2fb1b05 | 36 | #include "object.h" |
ead1e424 ILT |
37 | #include "symtab.h" |
38 | #include "reloc.h" | |
b8e6aad9 | 39 | #include "merge.h" |
2a00e4fb | 40 | #include "descriptors.h" |
a2fb1b05 ILT |
41 | #include "output.h" |
42 | ||
c420411f ILT |
43 | // Some BSD systems still use MAP_ANON instead of MAP_ANONYMOUS |
44 | #ifndef MAP_ANONYMOUS | |
45 | # define MAP_ANONYMOUS MAP_ANON | |
46 | #endif | |
47 | ||
9201d894 ILT |
48 | #ifndef HAVE_POSIX_FALLOCATE |
49 | // A dummy, non general, version of posix_fallocate. Here we just set | |
50 | // the file size and hope that there is enough disk space. FIXME: We | |
51 | // could allocate disk space by walking block by block and writing a | |
52 | // zero byte into each block. | |
53 | static int | |
54 | posix_fallocate(int o, off_t offset, off_t len) | |
55 | { | |
56 | return ftruncate(o, offset + len); | |
57 | } | |
58 | #endif // !defined(HAVE_POSIX_FALLOCATE) | |
59 | ||
a2fb1b05 ILT |
60 | namespace gold |
61 | { | |
62 | ||
a3ad94ed ILT |
63 | // Output_data variables. |
64 | ||
27bc2bce | 65 | bool Output_data::allocated_sizes_are_fixed; |
a3ad94ed | 66 | |
a2fb1b05 ILT |
67 | // Output_data methods. |
68 | ||
69 | Output_data::~Output_data() | |
70 | { | |
71 | } | |
72 | ||
730cdc88 ILT |
73 | // Return the default alignment for the target size. |
74 | ||
75 | uint64_t | |
76 | Output_data::default_alignment() | |
77 | { | |
8851ecca ILT |
78 | return Output_data::default_alignment_for_size( |
79 | parameters->target().get_size()); | |
730cdc88 ILT |
80 | } |
81 | ||
75f65a3e ILT |
82 | // Return the default alignment for a size--32 or 64. |
83 | ||
84 | uint64_t | |
730cdc88 | 85 | Output_data::default_alignment_for_size(int size) |
75f65a3e ILT |
86 | { |
87 | if (size == 32) | |
88 | return 4; | |
89 | else if (size == 64) | |
90 | return 8; | |
91 | else | |
a3ad94ed | 92 | gold_unreachable(); |
75f65a3e ILT |
93 | } |
94 | ||
75f65a3e ILT |
95 | // Output_section_header methods. This currently assumes that the |
96 | // segment and section lists are complete at construction time. | |
97 | ||
98 | Output_section_headers::Output_section_headers( | |
16649710 ILT |
99 | const Layout* layout, |
100 | const Layout::Segment_list* segment_list, | |
6a74a719 | 101 | const Layout::Section_list* section_list, |
16649710 | 102 | const Layout::Section_list* unattached_section_list, |
d491d34e ILT |
103 | const Stringpool* secnamepool, |
104 | const Output_section* shstrtab_section) | |
9025d29d | 105 | : layout_(layout), |
75f65a3e | 106 | segment_list_(segment_list), |
6a74a719 | 107 | section_list_(section_list), |
a3ad94ed | 108 | unattached_section_list_(unattached_section_list), |
d491d34e ILT |
109 | secnamepool_(secnamepool), |
110 | shstrtab_section_(shstrtab_section) | |
20e6d0d6 DK |
111 | { |
112 | } | |
113 | ||
114 | // Compute the current data size. | |
115 | ||
116 | off_t | |
117 | Output_section_headers::do_size() const | |
75f65a3e | 118 | { |
61ba1cf9 ILT |
119 | // Count all the sections. Start with 1 for the null section. |
120 | off_t count = 1; | |
8851ecca | 121 | if (!parameters->options().relocatable()) |
6a74a719 | 122 | { |
20e6d0d6 DK |
123 | for (Layout::Segment_list::const_iterator p = |
124 | this->segment_list_->begin(); | |
125 | p != this->segment_list_->end(); | |
6a74a719 ILT |
126 | ++p) |
127 | if ((*p)->type() == elfcpp::PT_LOAD) | |
128 | count += (*p)->output_section_count(); | |
129 | } | |
130 | else | |
131 | { | |
20e6d0d6 DK |
132 | for (Layout::Section_list::const_iterator p = |
133 | this->section_list_->begin(); | |
134 | p != this->section_list_->end(); | |
6a74a719 ILT |
135 | ++p) |
136 | if (((*p)->flags() & elfcpp::SHF_ALLOC) != 0) | |
137 | ++count; | |
138 | } | |
20e6d0d6 | 139 | count += this->unattached_section_list_->size(); |
75f65a3e | 140 | |
8851ecca | 141 | const int size = parameters->target().get_size(); |
75f65a3e ILT |
142 | int shdr_size; |
143 | if (size == 32) | |
144 | shdr_size = elfcpp::Elf_sizes<32>::shdr_size; | |
145 | else if (size == 64) | |
146 | shdr_size = elfcpp::Elf_sizes<64>::shdr_size; | |
147 | else | |
a3ad94ed | 148 | gold_unreachable(); |
75f65a3e | 149 | |
20e6d0d6 | 150 | return count * shdr_size; |
75f65a3e ILT |
151 | } |
152 | ||
61ba1cf9 ILT |
153 | // Write out the section headers. |
154 | ||
75f65a3e | 155 | void |
61ba1cf9 | 156 | Output_section_headers::do_write(Output_file* of) |
a2fb1b05 | 157 | { |
8851ecca | 158 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 159 | { |
9025d29d | 160 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca ILT |
161 | case Parameters::TARGET_32_LITTLE: |
162 | this->do_sized_write<32, false>(of); | |
163 | break; | |
9025d29d | 164 | #endif |
8851ecca ILT |
165 | #ifdef HAVE_TARGET_32_BIG |
166 | case Parameters::TARGET_32_BIG: | |
167 | this->do_sized_write<32, true>(of); | |
168 | break; | |
9025d29d | 169 | #endif |
9025d29d | 170 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca ILT |
171 | case Parameters::TARGET_64_LITTLE: |
172 | this->do_sized_write<64, false>(of); | |
173 | break; | |
9025d29d | 174 | #endif |
8851ecca ILT |
175 | #ifdef HAVE_TARGET_64_BIG |
176 | case Parameters::TARGET_64_BIG: | |
177 | this->do_sized_write<64, true>(of); | |
178 | break; | |
179 | #endif | |
180 | default: | |
181 | gold_unreachable(); | |
61ba1cf9 | 182 | } |
61ba1cf9 ILT |
183 | } |
184 | ||
185 | template<int size, bool big_endian> | |
186 | void | |
187 | Output_section_headers::do_sized_write(Output_file* of) | |
188 | { | |
189 | off_t all_shdrs_size = this->data_size(); | |
190 | unsigned char* view = of->get_output_view(this->offset(), all_shdrs_size); | |
191 | ||
192 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
193 | unsigned char* v = view; | |
194 | ||
195 | { | |
196 | typename elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
197 | oshdr.put_sh_name(0); | |
198 | oshdr.put_sh_type(elfcpp::SHT_NULL); | |
199 | oshdr.put_sh_flags(0); | |
200 | oshdr.put_sh_addr(0); | |
201 | oshdr.put_sh_offset(0); | |
d491d34e ILT |
202 | |
203 | size_t section_count = (this->data_size() | |
204 | / elfcpp::Elf_sizes<size>::shdr_size); | |
205 | if (section_count < elfcpp::SHN_LORESERVE) | |
206 | oshdr.put_sh_size(0); | |
207 | else | |
208 | oshdr.put_sh_size(section_count); | |
209 | ||
210 | unsigned int shstrndx = this->shstrtab_section_->out_shndx(); | |
211 | if (shstrndx < elfcpp::SHN_LORESERVE) | |
212 | oshdr.put_sh_link(0); | |
213 | else | |
214 | oshdr.put_sh_link(shstrndx); | |
215 | ||
61ba1cf9 ILT |
216 | oshdr.put_sh_info(0); |
217 | oshdr.put_sh_addralign(0); | |
218 | oshdr.put_sh_entsize(0); | |
219 | } | |
220 | ||
221 | v += shdr_size; | |
222 | ||
6a74a719 | 223 | unsigned int shndx = 1; |
8851ecca | 224 | if (!parameters->options().relocatable()) |
6a74a719 ILT |
225 | { |
226 | for (Layout::Segment_list::const_iterator p = | |
227 | this->segment_list_->begin(); | |
228 | p != this->segment_list_->end(); | |
229 | ++p) | |
230 | v = (*p)->write_section_headers<size, big_endian>(this->layout_, | |
231 | this->secnamepool_, | |
232 | v, | |
233 | &shndx); | |
234 | } | |
235 | else | |
236 | { | |
237 | for (Layout::Section_list::const_iterator p = | |
238 | this->section_list_->begin(); | |
239 | p != this->section_list_->end(); | |
240 | ++p) | |
241 | { | |
242 | // We do unallocated sections below, except that group | |
243 | // sections have to come first. | |
244 | if (((*p)->flags() & elfcpp::SHF_ALLOC) == 0 | |
245 | && (*p)->type() != elfcpp::SHT_GROUP) | |
246 | continue; | |
247 | gold_assert(shndx == (*p)->out_shndx()); | |
248 | elfcpp::Shdr_write<size, big_endian> oshdr(v); | |
249 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); | |
250 | v += shdr_size; | |
251 | ++shndx; | |
252 | } | |
253 | } | |
254 | ||
a3ad94ed | 255 | for (Layout::Section_list::const_iterator p = |
16649710 ILT |
256 | this->unattached_section_list_->begin(); |
257 | p != this->unattached_section_list_->end(); | |
61ba1cf9 ILT |
258 | ++p) |
259 | { | |
6a74a719 ILT |
260 | // For a relocatable link, we did unallocated group sections |
261 | // above, since they have to come first. | |
262 | if ((*p)->type() == elfcpp::SHT_GROUP | |
8851ecca | 263 | && parameters->options().relocatable()) |
6a74a719 | 264 | continue; |
a3ad94ed | 265 | gold_assert(shndx == (*p)->out_shndx()); |
61ba1cf9 | 266 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 267 | (*p)->write_header(this->layout_, this->secnamepool_, &oshdr); |
61ba1cf9 | 268 | v += shdr_size; |
ead1e424 | 269 | ++shndx; |
61ba1cf9 ILT |
270 | } |
271 | ||
272 | of->write_output_view(this->offset(), all_shdrs_size, view); | |
a2fb1b05 ILT |
273 | } |
274 | ||
54dc6425 ILT |
275 | // Output_segment_header methods. |
276 | ||
61ba1cf9 | 277 | Output_segment_headers::Output_segment_headers( |
61ba1cf9 | 278 | const Layout::Segment_list& segment_list) |
9025d29d | 279 | : segment_list_(segment_list) |
61ba1cf9 | 280 | { |
61ba1cf9 ILT |
281 | } |
282 | ||
54dc6425 | 283 | void |
61ba1cf9 | 284 | Output_segment_headers::do_write(Output_file* of) |
75f65a3e | 285 | { |
8851ecca | 286 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 287 | { |
9025d29d | 288 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca ILT |
289 | case Parameters::TARGET_32_LITTLE: |
290 | this->do_sized_write<32, false>(of); | |
291 | break; | |
9025d29d | 292 | #endif |
8851ecca ILT |
293 | #ifdef HAVE_TARGET_32_BIG |
294 | case Parameters::TARGET_32_BIG: | |
295 | this->do_sized_write<32, true>(of); | |
296 | break; | |
9025d29d | 297 | #endif |
9025d29d | 298 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca ILT |
299 | case Parameters::TARGET_64_LITTLE: |
300 | this->do_sized_write<64, false>(of); | |
301 | break; | |
9025d29d | 302 | #endif |
8851ecca ILT |
303 | #ifdef HAVE_TARGET_64_BIG |
304 | case Parameters::TARGET_64_BIG: | |
305 | this->do_sized_write<64, true>(of); | |
306 | break; | |
307 | #endif | |
308 | default: | |
309 | gold_unreachable(); | |
61ba1cf9 | 310 | } |
61ba1cf9 ILT |
311 | } |
312 | ||
313 | template<int size, bool big_endian> | |
314 | void | |
315 | Output_segment_headers::do_sized_write(Output_file* of) | |
316 | { | |
317 | const int phdr_size = elfcpp::Elf_sizes<size>::phdr_size; | |
318 | off_t all_phdrs_size = this->segment_list_.size() * phdr_size; | |
a445fddf | 319 | gold_assert(all_phdrs_size == this->data_size()); |
61ba1cf9 ILT |
320 | unsigned char* view = of->get_output_view(this->offset(), |
321 | all_phdrs_size); | |
322 | unsigned char* v = view; | |
323 | for (Layout::Segment_list::const_iterator p = this->segment_list_.begin(); | |
324 | p != this->segment_list_.end(); | |
325 | ++p) | |
326 | { | |
327 | elfcpp::Phdr_write<size, big_endian> ophdr(v); | |
328 | (*p)->write_header(&ophdr); | |
329 | v += phdr_size; | |
330 | } | |
331 | ||
a445fddf ILT |
332 | gold_assert(v - view == all_phdrs_size); |
333 | ||
61ba1cf9 | 334 | of->write_output_view(this->offset(), all_phdrs_size, view); |
75f65a3e ILT |
335 | } |
336 | ||
20e6d0d6 DK |
337 | off_t |
338 | Output_segment_headers::do_size() const | |
339 | { | |
340 | const int size = parameters->target().get_size(); | |
341 | int phdr_size; | |
342 | if (size == 32) | |
343 | phdr_size = elfcpp::Elf_sizes<32>::phdr_size; | |
344 | else if (size == 64) | |
345 | phdr_size = elfcpp::Elf_sizes<64>::phdr_size; | |
346 | else | |
347 | gold_unreachable(); | |
348 | ||
349 | return this->segment_list_.size() * phdr_size; | |
350 | } | |
351 | ||
75f65a3e ILT |
352 | // Output_file_header methods. |
353 | ||
9025d29d | 354 | Output_file_header::Output_file_header(const Target* target, |
75f65a3e | 355 | const Symbol_table* symtab, |
d391083d | 356 | const Output_segment_headers* osh, |
2ea97941 | 357 | const char* entry) |
9025d29d | 358 | : target_(target), |
75f65a3e | 359 | symtab_(symtab), |
61ba1cf9 | 360 | segment_header_(osh), |
75f65a3e | 361 | section_header_(NULL), |
d391083d | 362 | shstrtab_(NULL), |
2ea97941 | 363 | entry_(entry) |
75f65a3e | 364 | { |
20e6d0d6 | 365 | this->set_data_size(this->do_size()); |
75f65a3e ILT |
366 | } |
367 | ||
368 | // Set the section table information for a file header. | |
369 | ||
370 | void | |
371 | Output_file_header::set_section_info(const Output_section_headers* shdrs, | |
372 | const Output_section* shstrtab) | |
373 | { | |
374 | this->section_header_ = shdrs; | |
375 | this->shstrtab_ = shstrtab; | |
376 | } | |
377 | ||
378 | // Write out the file header. | |
379 | ||
380 | void | |
61ba1cf9 | 381 | Output_file_header::do_write(Output_file* of) |
54dc6425 | 382 | { |
27bc2bce ILT |
383 | gold_assert(this->offset() == 0); |
384 | ||
8851ecca | 385 | switch (parameters->size_and_endianness()) |
61ba1cf9 | 386 | { |
9025d29d | 387 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca ILT |
388 | case Parameters::TARGET_32_LITTLE: |
389 | this->do_sized_write<32, false>(of); | |
390 | break; | |
9025d29d | 391 | #endif |
8851ecca ILT |
392 | #ifdef HAVE_TARGET_32_BIG |
393 | case Parameters::TARGET_32_BIG: | |
394 | this->do_sized_write<32, true>(of); | |
395 | break; | |
9025d29d | 396 | #endif |
9025d29d | 397 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca ILT |
398 | case Parameters::TARGET_64_LITTLE: |
399 | this->do_sized_write<64, false>(of); | |
400 | break; | |
9025d29d | 401 | #endif |
8851ecca ILT |
402 | #ifdef HAVE_TARGET_64_BIG |
403 | case Parameters::TARGET_64_BIG: | |
404 | this->do_sized_write<64, true>(of); | |
405 | break; | |
406 | #endif | |
407 | default: | |
408 | gold_unreachable(); | |
61ba1cf9 | 409 | } |
61ba1cf9 ILT |
410 | } |
411 | ||
412 | // Write out the file header with appropriate size and endianess. | |
413 | ||
414 | template<int size, bool big_endian> | |
415 | void | |
416 | Output_file_header::do_sized_write(Output_file* of) | |
417 | { | |
a3ad94ed | 418 | gold_assert(this->offset() == 0); |
61ba1cf9 ILT |
419 | |
420 | int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size; | |
421 | unsigned char* view = of->get_output_view(0, ehdr_size); | |
422 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); | |
423 | ||
424 | unsigned char e_ident[elfcpp::EI_NIDENT]; | |
425 | memset(e_ident, 0, elfcpp::EI_NIDENT); | |
426 | e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0; | |
427 | e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1; | |
428 | e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2; | |
429 | e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3; | |
430 | if (size == 32) | |
431 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32; | |
432 | else if (size == 64) | |
433 | e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64; | |
434 | else | |
a3ad94ed | 435 | gold_unreachable(); |
61ba1cf9 ILT |
436 | e_ident[elfcpp::EI_DATA] = (big_endian |
437 | ? elfcpp::ELFDATA2MSB | |
438 | : elfcpp::ELFDATA2LSB); | |
439 | e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT; | |
61ba1cf9 ILT |
440 | oehdr.put_e_ident(e_ident); |
441 | ||
442 | elfcpp::ET e_type; | |
8851ecca | 443 | if (parameters->options().relocatable()) |
61ba1cf9 | 444 | e_type = elfcpp::ET_REL; |
374ad285 | 445 | else if (parameters->options().output_is_position_independent()) |
436ca963 | 446 | e_type = elfcpp::ET_DYN; |
61ba1cf9 ILT |
447 | else |
448 | e_type = elfcpp::ET_EXEC; | |
449 | oehdr.put_e_type(e_type); | |
450 | ||
451 | oehdr.put_e_machine(this->target_->machine_code()); | |
452 | oehdr.put_e_version(elfcpp::EV_CURRENT); | |
453 | ||
d391083d | 454 | oehdr.put_e_entry(this->entry<size>()); |
61ba1cf9 | 455 | |
6a74a719 ILT |
456 | if (this->segment_header_ == NULL) |
457 | oehdr.put_e_phoff(0); | |
458 | else | |
459 | oehdr.put_e_phoff(this->segment_header_->offset()); | |
460 | ||
61ba1cf9 | 461 | oehdr.put_e_shoff(this->section_header_->offset()); |
d5b40221 | 462 | oehdr.put_e_flags(this->target_->processor_specific_flags()); |
61ba1cf9 | 463 | oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size); |
6a74a719 ILT |
464 | |
465 | if (this->segment_header_ == NULL) | |
466 | { | |
467 | oehdr.put_e_phentsize(0); | |
468 | oehdr.put_e_phnum(0); | |
469 | } | |
470 | else | |
471 | { | |
472 | oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size); | |
473 | oehdr.put_e_phnum(this->segment_header_->data_size() | |
474 | / elfcpp::Elf_sizes<size>::phdr_size); | |
475 | } | |
476 | ||
61ba1cf9 | 477 | oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size); |
d491d34e ILT |
478 | size_t section_count = (this->section_header_->data_size() |
479 | / elfcpp::Elf_sizes<size>::shdr_size); | |
480 | ||
481 | if (section_count < elfcpp::SHN_LORESERVE) | |
482 | oehdr.put_e_shnum(this->section_header_->data_size() | |
483 | / elfcpp::Elf_sizes<size>::shdr_size); | |
484 | else | |
485 | oehdr.put_e_shnum(0); | |
486 | ||
487 | unsigned int shstrndx = this->shstrtab_->out_shndx(); | |
488 | if (shstrndx < elfcpp::SHN_LORESERVE) | |
489 | oehdr.put_e_shstrndx(this->shstrtab_->out_shndx()); | |
490 | else | |
491 | oehdr.put_e_shstrndx(elfcpp::SHN_XINDEX); | |
61ba1cf9 | 492 | |
36959681 ILT |
493 | // Let the target adjust the ELF header, e.g., to set EI_OSABI in |
494 | // the e_ident field. | |
495 | parameters->target().adjust_elf_header(view, ehdr_size); | |
496 | ||
61ba1cf9 | 497 | of->write_output_view(0, ehdr_size, view); |
54dc6425 ILT |
498 | } |
499 | ||
d391083d ILT |
500 | // Return the value to use for the entry address. THIS->ENTRY_ is the |
501 | // symbol specified on the command line, if any. | |
502 | ||
503 | template<int size> | |
504 | typename elfcpp::Elf_types<size>::Elf_Addr | |
505 | Output_file_header::entry() | |
506 | { | |
507 | const bool should_issue_warning = (this->entry_ != NULL | |
8851ecca ILT |
508 | && !parameters->options().relocatable() |
509 | && !parameters->options().shared()); | |
d391083d ILT |
510 | |
511 | // FIXME: Need to support target specific entry symbol. | |
2ea97941 ILT |
512 | const char* entry = this->entry_; |
513 | if (entry == NULL) | |
514 | entry = "_start"; | |
d391083d | 515 | |
2ea97941 | 516 | Symbol* sym = this->symtab_->lookup(entry); |
d391083d ILT |
517 | |
518 | typename Sized_symbol<size>::Value_type v; | |
519 | if (sym != NULL) | |
520 | { | |
521 | Sized_symbol<size>* ssym; | |
522 | ssym = this->symtab_->get_sized_symbol<size>(sym); | |
523 | if (!ssym->is_defined() && should_issue_warning) | |
2ea97941 | 524 | gold_warning("entry symbol '%s' exists but is not defined", entry); |
d391083d ILT |
525 | v = ssym->value(); |
526 | } | |
527 | else | |
528 | { | |
529 | // We couldn't find the entry symbol. See if we can parse it as | |
530 | // a number. This supports, e.g., -e 0x1000. | |
531 | char* endptr; | |
2ea97941 | 532 | v = strtoull(entry, &endptr, 0); |
d391083d ILT |
533 | if (*endptr != '\0') |
534 | { | |
535 | if (should_issue_warning) | |
2ea97941 | 536 | gold_warning("cannot find entry symbol '%s'", entry); |
d391083d ILT |
537 | v = 0; |
538 | } | |
539 | } | |
540 | ||
541 | return v; | |
542 | } | |
543 | ||
20e6d0d6 DK |
544 | // Compute the current data size. |
545 | ||
546 | off_t | |
547 | Output_file_header::do_size() const | |
548 | { | |
549 | const int size = parameters->target().get_size(); | |
550 | if (size == 32) | |
551 | return elfcpp::Elf_sizes<32>::ehdr_size; | |
552 | else if (size == 64) | |
553 | return elfcpp::Elf_sizes<64>::ehdr_size; | |
554 | else | |
555 | gold_unreachable(); | |
556 | } | |
557 | ||
dbe717ef ILT |
558 | // Output_data_const methods. |
559 | ||
560 | void | |
a3ad94ed | 561 | Output_data_const::do_write(Output_file* of) |
dbe717ef | 562 | { |
a3ad94ed ILT |
563 | of->write(this->offset(), this->data_.data(), this->data_.size()); |
564 | } | |
565 | ||
566 | // Output_data_const_buffer methods. | |
567 | ||
568 | void | |
569 | Output_data_const_buffer::do_write(Output_file* of) | |
570 | { | |
571 | of->write(this->offset(), this->p_, this->data_size()); | |
dbe717ef ILT |
572 | } |
573 | ||
574 | // Output_section_data methods. | |
575 | ||
16649710 ILT |
576 | // Record the output section, and set the entry size and such. |
577 | ||
578 | void | |
579 | Output_section_data::set_output_section(Output_section* os) | |
580 | { | |
581 | gold_assert(this->output_section_ == NULL); | |
582 | this->output_section_ = os; | |
583 | this->do_adjust_output_section(os); | |
584 | } | |
585 | ||
586 | // Return the section index of the output section. | |
587 | ||
dbe717ef ILT |
588 | unsigned int |
589 | Output_section_data::do_out_shndx() const | |
590 | { | |
a3ad94ed | 591 | gold_assert(this->output_section_ != NULL); |
dbe717ef ILT |
592 | return this->output_section_->out_shndx(); |
593 | } | |
594 | ||
759b1a24 ILT |
595 | // Set the alignment, which means we may need to update the alignment |
596 | // of the output section. | |
597 | ||
598 | void | |
2ea97941 | 599 | Output_section_data::set_addralign(uint64_t addralign) |
759b1a24 | 600 | { |
2ea97941 | 601 | this->addralign_ = addralign; |
759b1a24 | 602 | if (this->output_section_ != NULL |
2ea97941 ILT |
603 | && this->output_section_->addralign() < addralign) |
604 | this->output_section_->set_addralign(addralign); | |
759b1a24 ILT |
605 | } |
606 | ||
a3ad94ed ILT |
607 | // Output_data_strtab methods. |
608 | ||
27bc2bce | 609 | // Set the final data size. |
a3ad94ed ILT |
610 | |
611 | void | |
27bc2bce | 612 | Output_data_strtab::set_final_data_size() |
a3ad94ed ILT |
613 | { |
614 | this->strtab_->set_string_offsets(); | |
615 | this->set_data_size(this->strtab_->get_strtab_size()); | |
616 | } | |
617 | ||
618 | // Write out a string table. | |
619 | ||
620 | void | |
621 | Output_data_strtab::do_write(Output_file* of) | |
622 | { | |
623 | this->strtab_->write(of, this->offset()); | |
624 | } | |
625 | ||
c06b7b0b ILT |
626 | // Output_reloc methods. |
627 | ||
7bf1f802 ILT |
628 | // A reloc against a global symbol. |
629 | ||
630 | template<bool dynamic, int size, bool big_endian> | |
631 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
632 | Symbol* gsym, | |
633 | unsigned int type, | |
634 | Output_data* od, | |
e8c846c3 | 635 | Address address, |
2ea97941 | 636 | bool is_relative) |
7bf1f802 | 637 | : address_(address), local_sym_index_(GSYM_CODE), type_(type), |
2ea97941 | 638 | is_relative_(is_relative), is_section_symbol_(false), shndx_(INVALID_CODE) |
7bf1f802 | 639 | { |
dceae3c1 ILT |
640 | // this->type_ is a bitfield; make sure TYPE fits. |
641 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
642 | this->u1_.gsym = gsym; |
643 | this->u2_.od = od; | |
dceae3c1 ILT |
644 | if (dynamic) |
645 | this->set_needs_dynsym_index(); | |
7bf1f802 ILT |
646 | } |
647 | ||
648 | template<bool dynamic, int size, bool big_endian> | |
649 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
650 | Symbol* gsym, | |
651 | unsigned int type, | |
ef9beddf | 652 | Sized_relobj<size, big_endian>* relobj, |
7bf1f802 | 653 | unsigned int shndx, |
e8c846c3 | 654 | Address address, |
2ea97941 | 655 | bool is_relative) |
7bf1f802 | 656 | : address_(address), local_sym_index_(GSYM_CODE), type_(type), |
2ea97941 | 657 | is_relative_(is_relative), is_section_symbol_(false), shndx_(shndx) |
7bf1f802 ILT |
658 | { |
659 | gold_assert(shndx != INVALID_CODE); | |
dceae3c1 ILT |
660 | // this->type_ is a bitfield; make sure TYPE fits. |
661 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
662 | this->u1_.gsym = gsym; |
663 | this->u2_.relobj = relobj; | |
dceae3c1 ILT |
664 | if (dynamic) |
665 | this->set_needs_dynsym_index(); | |
7bf1f802 ILT |
666 | } |
667 | ||
668 | // A reloc against a local symbol. | |
669 | ||
670 | template<bool dynamic, int size, bool big_endian> | |
671 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
672 | Sized_relobj<size, big_endian>* relobj, | |
673 | unsigned int local_sym_index, | |
674 | unsigned int type, | |
675 | Output_data* od, | |
e8c846c3 | 676 | Address address, |
2ea97941 | 677 | bool is_relative, |
dceae3c1 | 678 | bool is_section_symbol) |
7bf1f802 | 679 | : address_(address), local_sym_index_(local_sym_index), type_(type), |
2ea97941 | 680 | is_relative_(is_relative), is_section_symbol_(is_section_symbol), |
dceae3c1 | 681 | shndx_(INVALID_CODE) |
7bf1f802 ILT |
682 | { |
683 | gold_assert(local_sym_index != GSYM_CODE | |
684 | && local_sym_index != INVALID_CODE); | |
dceae3c1 ILT |
685 | // this->type_ is a bitfield; make sure TYPE fits. |
686 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
687 | this->u1_.relobj = relobj; |
688 | this->u2_.od = od; | |
dceae3c1 ILT |
689 | if (dynamic) |
690 | this->set_needs_dynsym_index(); | |
7bf1f802 ILT |
691 | } |
692 | ||
693 | template<bool dynamic, int size, bool big_endian> | |
694 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
695 | Sized_relobj<size, big_endian>* relobj, | |
696 | unsigned int local_sym_index, | |
697 | unsigned int type, | |
698 | unsigned int shndx, | |
e8c846c3 | 699 | Address address, |
2ea97941 | 700 | bool is_relative, |
dceae3c1 | 701 | bool is_section_symbol) |
7bf1f802 | 702 | : address_(address), local_sym_index_(local_sym_index), type_(type), |
2ea97941 | 703 | is_relative_(is_relative), is_section_symbol_(is_section_symbol), |
dceae3c1 | 704 | shndx_(shndx) |
7bf1f802 ILT |
705 | { |
706 | gold_assert(local_sym_index != GSYM_CODE | |
707 | && local_sym_index != INVALID_CODE); | |
708 | gold_assert(shndx != INVALID_CODE); | |
dceae3c1 ILT |
709 | // this->type_ is a bitfield; make sure TYPE fits. |
710 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
711 | this->u1_.relobj = relobj; |
712 | this->u2_.relobj = relobj; | |
dceae3c1 ILT |
713 | if (dynamic) |
714 | this->set_needs_dynsym_index(); | |
7bf1f802 ILT |
715 | } |
716 | ||
717 | // A reloc against the STT_SECTION symbol of an output section. | |
718 | ||
719 | template<bool dynamic, int size, bool big_endian> | |
720 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
721 | Output_section* os, | |
722 | unsigned int type, | |
723 | Output_data* od, | |
724 | Address address) | |
725 | : address_(address), local_sym_index_(SECTION_CODE), type_(type), | |
dceae3c1 | 726 | is_relative_(false), is_section_symbol_(true), shndx_(INVALID_CODE) |
7bf1f802 | 727 | { |
dceae3c1 ILT |
728 | // this->type_ is a bitfield; make sure TYPE fits. |
729 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
730 | this->u1_.os = os; |
731 | this->u2_.od = od; | |
732 | if (dynamic) | |
dceae3c1 ILT |
733 | this->set_needs_dynsym_index(); |
734 | else | |
735 | os->set_needs_symtab_index(); | |
7bf1f802 ILT |
736 | } |
737 | ||
738 | template<bool dynamic, int size, bool big_endian> | |
739 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc( | |
740 | Output_section* os, | |
741 | unsigned int type, | |
ef9beddf | 742 | Sized_relobj<size, big_endian>* relobj, |
7bf1f802 ILT |
743 | unsigned int shndx, |
744 | Address address) | |
745 | : address_(address), local_sym_index_(SECTION_CODE), type_(type), | |
dceae3c1 | 746 | is_relative_(false), is_section_symbol_(true), shndx_(shndx) |
7bf1f802 ILT |
747 | { |
748 | gold_assert(shndx != INVALID_CODE); | |
dceae3c1 ILT |
749 | // this->type_ is a bitfield; make sure TYPE fits. |
750 | gold_assert(this->type_ == type); | |
7bf1f802 ILT |
751 | this->u1_.os = os; |
752 | this->u2_.relobj = relobj; | |
753 | if (dynamic) | |
dceae3c1 ILT |
754 | this->set_needs_dynsym_index(); |
755 | else | |
756 | os->set_needs_symtab_index(); | |
757 | } | |
758 | ||
759 | // Record that we need a dynamic symbol index for this relocation. | |
760 | ||
761 | template<bool dynamic, int size, bool big_endian> | |
762 | void | |
763 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>:: | |
764 | set_needs_dynsym_index() | |
765 | { | |
766 | if (this->is_relative_) | |
767 | return; | |
768 | switch (this->local_sym_index_) | |
769 | { | |
770 | case INVALID_CODE: | |
771 | gold_unreachable(); | |
772 | ||
773 | case GSYM_CODE: | |
774 | this->u1_.gsym->set_needs_dynsym_entry(); | |
775 | break; | |
776 | ||
777 | case SECTION_CODE: | |
778 | this->u1_.os->set_needs_dynsym_index(); | |
779 | break; | |
780 | ||
781 | case 0: | |
782 | break; | |
783 | ||
784 | default: | |
785 | { | |
786 | const unsigned int lsi = this->local_sym_index_; | |
787 | if (!this->is_section_symbol_) | |
788 | this->u1_.relobj->set_needs_output_dynsym_entry(lsi); | |
789 | else | |
ef9beddf | 790 | this->u1_.relobj->output_section(lsi)->set_needs_dynsym_index(); |
dceae3c1 ILT |
791 | } |
792 | break; | |
793 | } | |
7bf1f802 ILT |
794 | } |
795 | ||
c06b7b0b ILT |
796 | // Get the symbol index of a relocation. |
797 | ||
798 | template<bool dynamic, int size, bool big_endian> | |
799 | unsigned int | |
800 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index() | |
801 | const | |
802 | { | |
803 | unsigned int index; | |
804 | switch (this->local_sym_index_) | |
805 | { | |
806 | case INVALID_CODE: | |
a3ad94ed | 807 | gold_unreachable(); |
c06b7b0b ILT |
808 | |
809 | case GSYM_CODE: | |
5a6f7e2d | 810 | if (this->u1_.gsym == NULL) |
c06b7b0b ILT |
811 | index = 0; |
812 | else if (dynamic) | |
5a6f7e2d | 813 | index = this->u1_.gsym->dynsym_index(); |
c06b7b0b | 814 | else |
5a6f7e2d | 815 | index = this->u1_.gsym->symtab_index(); |
c06b7b0b ILT |
816 | break; |
817 | ||
818 | case SECTION_CODE: | |
819 | if (dynamic) | |
5a6f7e2d | 820 | index = this->u1_.os->dynsym_index(); |
c06b7b0b | 821 | else |
5a6f7e2d | 822 | index = this->u1_.os->symtab_index(); |
c06b7b0b ILT |
823 | break; |
824 | ||
436ca963 ILT |
825 | case 0: |
826 | // Relocations without symbols use a symbol index of 0. | |
827 | index = 0; | |
828 | break; | |
829 | ||
c06b7b0b | 830 | default: |
dceae3c1 ILT |
831 | { |
832 | const unsigned int lsi = this->local_sym_index_; | |
833 | if (!this->is_section_symbol_) | |
834 | { | |
835 | if (dynamic) | |
836 | index = this->u1_.relobj->dynsym_index(lsi); | |
837 | else | |
838 | index = this->u1_.relobj->symtab_index(lsi); | |
839 | } | |
840 | else | |
841 | { | |
ef9beddf | 842 | Output_section* os = this->u1_.relobj->output_section(lsi); |
dceae3c1 ILT |
843 | gold_assert(os != NULL); |
844 | if (dynamic) | |
845 | index = os->dynsym_index(); | |
846 | else | |
847 | index = os->symtab_index(); | |
848 | } | |
849 | } | |
c06b7b0b ILT |
850 | break; |
851 | } | |
a3ad94ed | 852 | gold_assert(index != -1U); |
c06b7b0b ILT |
853 | return index; |
854 | } | |
855 | ||
624f8810 ILT |
856 | // For a local section symbol, get the address of the offset ADDEND |
857 | // within the input section. | |
dceae3c1 ILT |
858 | |
859 | template<bool dynamic, int size, bool big_endian> | |
ef9beddf | 860 | typename elfcpp::Elf_types<size>::Elf_Addr |
dceae3c1 | 861 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>:: |
624f8810 | 862 | local_section_offset(Addend addend) const |
dceae3c1 | 863 | { |
624f8810 ILT |
864 | gold_assert(this->local_sym_index_ != GSYM_CODE |
865 | && this->local_sym_index_ != SECTION_CODE | |
866 | && this->local_sym_index_ != INVALID_CODE | |
867 | && this->is_section_symbol_); | |
dceae3c1 | 868 | const unsigned int lsi = this->local_sym_index_; |
ef9beddf | 869 | Output_section* os = this->u1_.relobj->output_section(lsi); |
624f8810 | 870 | gold_assert(os != NULL); |
ef9beddf | 871 | Address offset = this->u1_.relobj->get_output_section_offset(lsi); |
eff45813 | 872 | if (offset != invalid_address) |
624f8810 ILT |
873 | return offset + addend; |
874 | // This is a merge section. | |
875 | offset = os->output_address(this->u1_.relobj, lsi, addend); | |
eff45813 | 876 | gold_assert(offset != invalid_address); |
dceae3c1 ILT |
877 | return offset; |
878 | } | |
879 | ||
d98bc257 | 880 | // Get the output address of a relocation. |
c06b7b0b ILT |
881 | |
882 | template<bool dynamic, int size, bool big_endian> | |
a984ee1d | 883 | typename elfcpp::Elf_types<size>::Elf_Addr |
d98bc257 | 884 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_address() const |
c06b7b0b | 885 | { |
a3ad94ed | 886 | Address address = this->address_; |
5a6f7e2d ILT |
887 | if (this->shndx_ != INVALID_CODE) |
888 | { | |
ef9beddf | 889 | Output_section* os = this->u2_.relobj->output_section(this->shndx_); |
5a6f7e2d | 890 | gold_assert(os != NULL); |
ef9beddf | 891 | Address off = this->u2_.relobj->get_output_section_offset(this->shndx_); |
eff45813 | 892 | if (off != invalid_address) |
730cdc88 ILT |
893 | address += os->address() + off; |
894 | else | |
895 | { | |
896 | address = os->output_address(this->u2_.relobj, this->shndx_, | |
897 | address); | |
eff45813 | 898 | gold_assert(address != invalid_address); |
730cdc88 | 899 | } |
5a6f7e2d ILT |
900 | } |
901 | else if (this->u2_.od != NULL) | |
902 | address += this->u2_.od->address(); | |
d98bc257 ILT |
903 | return address; |
904 | } | |
905 | ||
906 | // Write out the offset and info fields of a Rel or Rela relocation | |
907 | // entry. | |
908 | ||
909 | template<bool dynamic, int size, bool big_endian> | |
910 | template<typename Write_rel> | |
911 | void | |
912 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel( | |
913 | Write_rel* wr) const | |
914 | { | |
915 | wr->put_r_offset(this->get_address()); | |
e8c846c3 ILT |
916 | unsigned int sym_index = this->is_relative_ ? 0 : this->get_symbol_index(); |
917 | wr->put_r_info(elfcpp::elf_r_info<size>(sym_index, this->type_)); | |
c06b7b0b ILT |
918 | } |
919 | ||
920 | // Write out a Rel relocation. | |
921 | ||
922 | template<bool dynamic, int size, bool big_endian> | |
923 | void | |
924 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write( | |
925 | unsigned char* pov) const | |
926 | { | |
927 | elfcpp::Rel_write<size, big_endian> orel(pov); | |
928 | this->write_rel(&orel); | |
929 | } | |
930 | ||
e8c846c3 ILT |
931 | // Get the value of the symbol referred to by a Rel relocation. |
932 | ||
933 | template<bool dynamic, int size, bool big_endian> | |
934 | typename elfcpp::Elf_types<size>::Elf_Addr | |
d1f003c6 | 935 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::symbol_value( |
624f8810 | 936 | Addend addend) const |
e8c846c3 ILT |
937 | { |
938 | if (this->local_sym_index_ == GSYM_CODE) | |
939 | { | |
940 | const Sized_symbol<size>* sym; | |
941 | sym = static_cast<const Sized_symbol<size>*>(this->u1_.gsym); | |
d1f003c6 | 942 | return sym->value() + addend; |
e8c846c3 ILT |
943 | } |
944 | gold_assert(this->local_sym_index_ != SECTION_CODE | |
d1f003c6 ILT |
945 | && this->local_sym_index_ != INVALID_CODE |
946 | && !this->is_section_symbol_); | |
947 | const unsigned int lsi = this->local_sym_index_; | |
948 | const Symbol_value<size>* symval = this->u1_.relobj->local_symbol(lsi); | |
949 | return symval->value(this->u1_.relobj, addend); | |
e8c846c3 ILT |
950 | } |
951 | ||
d98bc257 ILT |
952 | // Reloc comparison. This function sorts the dynamic relocs for the |
953 | // benefit of the dynamic linker. First we sort all relative relocs | |
954 | // to the front. Among relative relocs, we sort by output address. | |
955 | // Among non-relative relocs, we sort by symbol index, then by output | |
956 | // address. | |
957 | ||
958 | template<bool dynamic, int size, bool big_endian> | |
959 | int | |
960 | Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>:: | |
961 | compare(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& r2) | |
962 | const | |
963 | { | |
964 | if (this->is_relative_) | |
965 | { | |
966 | if (!r2.is_relative_) | |
967 | return -1; | |
968 | // Otherwise sort by reloc address below. | |
969 | } | |
970 | else if (r2.is_relative_) | |
971 | return 1; | |
972 | else | |
973 | { | |
974 | unsigned int sym1 = this->get_symbol_index(); | |
975 | unsigned int sym2 = r2.get_symbol_index(); | |
976 | if (sym1 < sym2) | |
977 | return -1; | |
978 | else if (sym1 > sym2) | |
979 | return 1; | |
980 | // Otherwise sort by reloc address. | |
981 | } | |
982 | ||
983 | section_offset_type addr1 = this->get_address(); | |
984 | section_offset_type addr2 = r2.get_address(); | |
985 | if (addr1 < addr2) | |
986 | return -1; | |
987 | else if (addr1 > addr2) | |
988 | return 1; | |
989 | ||
990 | // Final tie breaker, in order to generate the same output on any | |
991 | // host: reloc type. | |
992 | unsigned int type1 = this->type_; | |
993 | unsigned int type2 = r2.type_; | |
994 | if (type1 < type2) | |
995 | return -1; | |
996 | else if (type1 > type2) | |
997 | return 1; | |
998 | ||
999 | // These relocs appear to be exactly the same. | |
1000 | return 0; | |
1001 | } | |
1002 | ||
c06b7b0b ILT |
1003 | // Write out a Rela relocation. |
1004 | ||
1005 | template<bool dynamic, int size, bool big_endian> | |
1006 | void | |
1007 | Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write( | |
1008 | unsigned char* pov) const | |
1009 | { | |
1010 | elfcpp::Rela_write<size, big_endian> orel(pov); | |
1011 | this->rel_.write_rel(&orel); | |
e8c846c3 | 1012 | Addend addend = this->addend_; |
dceae3c1 | 1013 | if (this->rel_.is_relative()) |
d1f003c6 ILT |
1014 | addend = this->rel_.symbol_value(addend); |
1015 | else if (this->rel_.is_local_section_symbol()) | |
624f8810 | 1016 | addend = this->rel_.local_section_offset(addend); |
e8c846c3 | 1017 | orel.put_r_addend(addend); |
c06b7b0b ILT |
1018 | } |
1019 | ||
1020 | // Output_data_reloc_base methods. | |
1021 | ||
16649710 ILT |
1022 | // Adjust the output section. |
1023 | ||
1024 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
1025 | void | |
1026 | Output_data_reloc_base<sh_type, dynamic, size, big_endian> | |
1027 | ::do_adjust_output_section(Output_section* os) | |
1028 | { | |
1029 | if (sh_type == elfcpp::SHT_REL) | |
1030 | os->set_entsize(elfcpp::Elf_sizes<size>::rel_size); | |
1031 | else if (sh_type == elfcpp::SHT_RELA) | |
1032 | os->set_entsize(elfcpp::Elf_sizes<size>::rela_size); | |
1033 | else | |
1034 | gold_unreachable(); | |
1035 | if (dynamic) | |
1036 | os->set_should_link_to_dynsym(); | |
1037 | else | |
1038 | os->set_should_link_to_symtab(); | |
1039 | } | |
1040 | ||
c06b7b0b ILT |
1041 | // Write out relocation data. |
1042 | ||
1043 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
1044 | void | |
1045 | Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write( | |
1046 | Output_file* of) | |
1047 | { | |
1048 | const off_t off = this->offset(); | |
1049 | const off_t oview_size = this->data_size(); | |
1050 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
1051 | ||
3a44184e | 1052 | if (this->sort_relocs()) |
d98bc257 ILT |
1053 | { |
1054 | gold_assert(dynamic); | |
1055 | std::sort(this->relocs_.begin(), this->relocs_.end(), | |
1056 | Sort_relocs_comparison()); | |
1057 | } | |
1058 | ||
c06b7b0b ILT |
1059 | unsigned char* pov = oview; |
1060 | for (typename Relocs::const_iterator p = this->relocs_.begin(); | |
1061 | p != this->relocs_.end(); | |
1062 | ++p) | |
1063 | { | |
1064 | p->write(pov); | |
1065 | pov += reloc_size; | |
1066 | } | |
1067 | ||
a3ad94ed | 1068 | gold_assert(pov - oview == oview_size); |
c06b7b0b ILT |
1069 | |
1070 | of->write_output_view(off, oview_size, oview); | |
1071 | ||
1072 | // We no longer need the relocation entries. | |
1073 | this->relocs_.clear(); | |
1074 | } | |
1075 | ||
6a74a719 ILT |
1076 | // Class Output_relocatable_relocs. |
1077 | ||
1078 | template<int sh_type, int size, bool big_endian> | |
1079 | void | |
1080 | Output_relocatable_relocs<sh_type, size, big_endian>::set_final_data_size() | |
1081 | { | |
1082 | this->set_data_size(this->rr_->output_reloc_count() | |
1083 | * Reloc_types<sh_type, size, big_endian>::reloc_size); | |
1084 | } | |
1085 | ||
1086 | // class Output_data_group. | |
1087 | ||
1088 | template<int size, bool big_endian> | |
1089 | Output_data_group<size, big_endian>::Output_data_group( | |
1090 | Sized_relobj<size, big_endian>* relobj, | |
1091 | section_size_type entry_count, | |
8825ac63 ILT |
1092 | elfcpp::Elf_Word flags, |
1093 | std::vector<unsigned int>* input_shndxes) | |
20e6d0d6 | 1094 | : Output_section_data(entry_count * 4, 4, false), |
8825ac63 ILT |
1095 | relobj_(relobj), |
1096 | flags_(flags) | |
6a74a719 | 1097 | { |
8825ac63 | 1098 | this->input_shndxes_.swap(*input_shndxes); |
6a74a719 ILT |
1099 | } |
1100 | ||
1101 | // Write out the section group, which means translating the section | |
1102 | // indexes to apply to the output file. | |
1103 | ||
1104 | template<int size, bool big_endian> | |
1105 | void | |
1106 | Output_data_group<size, big_endian>::do_write(Output_file* of) | |
1107 | { | |
1108 | const off_t off = this->offset(); | |
1109 | const section_size_type oview_size = | |
1110 | convert_to_section_size_type(this->data_size()); | |
1111 | unsigned char* const oview = of->get_output_view(off, oview_size); | |
1112 | ||
1113 | elfcpp::Elf_Word* contents = reinterpret_cast<elfcpp::Elf_Word*>(oview); | |
1114 | elfcpp::Swap<32, big_endian>::writeval(contents, this->flags_); | |
1115 | ++contents; | |
1116 | ||
1117 | for (std::vector<unsigned int>::const_iterator p = | |
8825ac63 ILT |
1118 | this->input_shndxes_.begin(); |
1119 | p != this->input_shndxes_.end(); | |
6a74a719 ILT |
1120 | ++p, ++contents) |
1121 | { | |
ef9beddf | 1122 | Output_section* os = this->relobj_->output_section(*p); |
6a74a719 ILT |
1123 | |
1124 | unsigned int output_shndx; | |
1125 | if (os != NULL) | |
1126 | output_shndx = os->out_shndx(); | |
1127 | else | |
1128 | { | |
1129 | this->relobj_->error(_("section group retained but " | |
1130 | "group element discarded")); | |
1131 | output_shndx = 0; | |
1132 | } | |
1133 | ||
1134 | elfcpp::Swap<32, big_endian>::writeval(contents, output_shndx); | |
1135 | } | |
1136 | ||
1137 | size_t wrote = reinterpret_cast<unsigned char*>(contents) - oview; | |
1138 | gold_assert(wrote == oview_size); | |
1139 | ||
1140 | of->write_output_view(off, oview_size, oview); | |
1141 | ||
1142 | // We no longer need this information. | |
8825ac63 | 1143 | this->input_shndxes_.clear(); |
6a74a719 ILT |
1144 | } |
1145 | ||
dbe717ef | 1146 | // Output_data_got::Got_entry methods. |
ead1e424 ILT |
1147 | |
1148 | // Write out the entry. | |
1149 | ||
1150 | template<int size, bool big_endian> | |
1151 | void | |
7e1edb90 | 1152 | Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const |
ead1e424 ILT |
1153 | { |
1154 | Valtype val = 0; | |
1155 | ||
1156 | switch (this->local_sym_index_) | |
1157 | { | |
1158 | case GSYM_CODE: | |
1159 | { | |
e8c846c3 ILT |
1160 | // If the symbol is resolved locally, we need to write out the |
1161 | // link-time value, which will be relocated dynamically by a | |
1162 | // RELATIVE relocation. | |
ead1e424 | 1163 | Symbol* gsym = this->u_.gsym; |
e8c846c3 ILT |
1164 | Sized_symbol<size>* sgsym; |
1165 | // This cast is a bit ugly. We don't want to put a | |
1166 | // virtual method in Symbol, because we want Symbol to be | |
1167 | // as small as possible. | |
1168 | sgsym = static_cast<Sized_symbol<size>*>(gsym); | |
1169 | val = sgsym->value(); | |
ead1e424 ILT |
1170 | } |
1171 | break; | |
1172 | ||
1173 | case CONSTANT_CODE: | |
1174 | val = this->u_.constant; | |
1175 | break; | |
1176 | ||
1177 | default: | |
d1f003c6 ILT |
1178 | { |
1179 | const unsigned int lsi = this->local_sym_index_; | |
1180 | const Symbol_value<size>* symval = this->u_.object->local_symbol(lsi); | |
1181 | val = symval->value(this->u_.object, 0); | |
1182 | } | |
e727fa71 | 1183 | break; |
ead1e424 ILT |
1184 | } |
1185 | ||
a3ad94ed | 1186 | elfcpp::Swap<size, big_endian>::writeval(pov, val); |
ead1e424 ILT |
1187 | } |
1188 | ||
dbe717ef | 1189 | // Output_data_got methods. |
ead1e424 | 1190 | |
dbe717ef ILT |
1191 | // Add an entry for a global symbol to the GOT. This returns true if |
1192 | // this is a new GOT entry, false if the symbol already had a GOT | |
1193 | // entry. | |
1194 | ||
1195 | template<int size, bool big_endian> | |
1196 | bool | |
0a65a3a7 CC |
1197 | Output_data_got<size, big_endian>::add_global( |
1198 | Symbol* gsym, | |
1199 | unsigned int got_type) | |
ead1e424 | 1200 | { |
0a65a3a7 | 1201 | if (gsym->has_got_offset(got_type)) |
dbe717ef | 1202 | return false; |
ead1e424 | 1203 | |
dbe717ef ILT |
1204 | this->entries_.push_back(Got_entry(gsym)); |
1205 | this->set_got_size(); | |
0a65a3a7 | 1206 | gsym->set_got_offset(got_type, this->last_got_offset()); |
dbe717ef ILT |
1207 | return true; |
1208 | } | |
ead1e424 | 1209 | |
7bf1f802 ILT |
1210 | // Add an entry for a global symbol to the GOT, and add a dynamic |
1211 | // relocation of type R_TYPE for the GOT entry. | |
1212 | template<int size, bool big_endian> | |
1213 | void | |
1214 | Output_data_got<size, big_endian>::add_global_with_rel( | |
1215 | Symbol* gsym, | |
0a65a3a7 | 1216 | unsigned int got_type, |
7bf1f802 ILT |
1217 | Rel_dyn* rel_dyn, |
1218 | unsigned int r_type) | |
1219 | { | |
0a65a3a7 | 1220 | if (gsym->has_got_offset(got_type)) |
7bf1f802 ILT |
1221 | return; |
1222 | ||
1223 | this->entries_.push_back(Got_entry()); | |
1224 | this->set_got_size(); | |
2ea97941 ILT |
1225 | unsigned int got_offset = this->last_got_offset(); |
1226 | gsym->set_got_offset(got_type, got_offset); | |
1227 | rel_dyn->add_global(gsym, r_type, this, got_offset); | |
7bf1f802 ILT |
1228 | } |
1229 | ||
1230 | template<int size, bool big_endian> | |
1231 | void | |
1232 | Output_data_got<size, big_endian>::add_global_with_rela( | |
1233 | Symbol* gsym, | |
0a65a3a7 | 1234 | unsigned int got_type, |
7bf1f802 ILT |
1235 | Rela_dyn* rela_dyn, |
1236 | unsigned int r_type) | |
1237 | { | |
0a65a3a7 | 1238 | if (gsym->has_got_offset(got_type)) |
7bf1f802 ILT |
1239 | return; |
1240 | ||
1241 | this->entries_.push_back(Got_entry()); | |
1242 | this->set_got_size(); | |
2ea97941 ILT |
1243 | unsigned int got_offset = this->last_got_offset(); |
1244 | gsym->set_got_offset(got_type, got_offset); | |
1245 | rela_dyn->add_global(gsym, r_type, this, got_offset, 0); | |
7bf1f802 ILT |
1246 | } |
1247 | ||
0a65a3a7 CC |
1248 | // Add a pair of entries for a global symbol to the GOT, and add |
1249 | // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively. | |
1250 | // If R_TYPE_2 == 0, add the second entry with no relocation. | |
7bf1f802 ILT |
1251 | template<int size, bool big_endian> |
1252 | void | |
0a65a3a7 CC |
1253 | Output_data_got<size, big_endian>::add_global_pair_with_rel( |
1254 | Symbol* gsym, | |
1255 | unsigned int got_type, | |
7bf1f802 | 1256 | Rel_dyn* rel_dyn, |
0a65a3a7 CC |
1257 | unsigned int r_type_1, |
1258 | unsigned int r_type_2) | |
7bf1f802 | 1259 | { |
0a65a3a7 | 1260 | if (gsym->has_got_offset(got_type)) |
7bf1f802 ILT |
1261 | return; |
1262 | ||
1263 | this->entries_.push_back(Got_entry()); | |
2ea97941 ILT |
1264 | unsigned int got_offset = this->last_got_offset(); |
1265 | gsym->set_got_offset(got_type, got_offset); | |
1266 | rel_dyn->add_global(gsym, r_type_1, this, got_offset); | |
0a65a3a7 CC |
1267 | |
1268 | this->entries_.push_back(Got_entry()); | |
1269 | if (r_type_2 != 0) | |
1270 | { | |
2ea97941 ILT |
1271 | got_offset = this->last_got_offset(); |
1272 | rel_dyn->add_global(gsym, r_type_2, this, got_offset); | |
0a65a3a7 CC |
1273 | } |
1274 | ||
1275 | this->set_got_size(); | |
7bf1f802 ILT |
1276 | } |
1277 | ||
1278 | template<int size, bool big_endian> | |
1279 | void | |
0a65a3a7 CC |
1280 | Output_data_got<size, big_endian>::add_global_pair_with_rela( |
1281 | Symbol* gsym, | |
1282 | unsigned int got_type, | |
7bf1f802 | 1283 | Rela_dyn* rela_dyn, |
0a65a3a7 CC |
1284 | unsigned int r_type_1, |
1285 | unsigned int r_type_2) | |
7bf1f802 | 1286 | { |
0a65a3a7 | 1287 | if (gsym->has_got_offset(got_type)) |
7bf1f802 ILT |
1288 | return; |
1289 | ||
1290 | this->entries_.push_back(Got_entry()); | |
2ea97941 ILT |
1291 | unsigned int got_offset = this->last_got_offset(); |
1292 | gsym->set_got_offset(got_type, got_offset); | |
1293 | rela_dyn->add_global(gsym, r_type_1, this, got_offset, 0); | |
0a65a3a7 CC |
1294 | |
1295 | this->entries_.push_back(Got_entry()); | |
1296 | if (r_type_2 != 0) | |
1297 | { | |
2ea97941 ILT |
1298 | got_offset = this->last_got_offset(); |
1299 | rela_dyn->add_global(gsym, r_type_2, this, got_offset, 0); | |
0a65a3a7 CC |
1300 | } |
1301 | ||
1302 | this->set_got_size(); | |
7bf1f802 ILT |
1303 | } |
1304 | ||
0a65a3a7 CC |
1305 | // Add an entry for a local symbol to the GOT. This returns true if |
1306 | // this is a new GOT entry, false if the symbol already has a GOT | |
1307 | // entry. | |
07f397ab ILT |
1308 | |
1309 | template<int size, bool big_endian> | |
1310 | bool | |
0a65a3a7 CC |
1311 | Output_data_got<size, big_endian>::add_local( |
1312 | Sized_relobj<size, big_endian>* object, | |
1313 | unsigned int symndx, | |
1314 | unsigned int got_type) | |
07f397ab | 1315 | { |
0a65a3a7 | 1316 | if (object->local_has_got_offset(symndx, got_type)) |
07f397ab ILT |
1317 | return false; |
1318 | ||
0a65a3a7 | 1319 | this->entries_.push_back(Got_entry(object, symndx)); |
07f397ab | 1320 | this->set_got_size(); |
0a65a3a7 | 1321 | object->set_local_got_offset(symndx, got_type, this->last_got_offset()); |
07f397ab ILT |
1322 | return true; |
1323 | } | |
1324 | ||
0a65a3a7 CC |
1325 | // Add an entry for a local symbol to the GOT, and add a dynamic |
1326 | // relocation of type R_TYPE for the GOT entry. | |
7bf1f802 ILT |
1327 | template<int size, bool big_endian> |
1328 | void | |
0a65a3a7 CC |
1329 | Output_data_got<size, big_endian>::add_local_with_rel( |
1330 | Sized_relobj<size, big_endian>* object, | |
1331 | unsigned int symndx, | |
1332 | unsigned int got_type, | |
7bf1f802 ILT |
1333 | Rel_dyn* rel_dyn, |
1334 | unsigned int r_type) | |
1335 | { | |
0a65a3a7 | 1336 | if (object->local_has_got_offset(symndx, got_type)) |
7bf1f802 ILT |
1337 | return; |
1338 | ||
1339 | this->entries_.push_back(Got_entry()); | |
1340 | this->set_got_size(); | |
2ea97941 ILT |
1341 | unsigned int got_offset = this->last_got_offset(); |
1342 | object->set_local_got_offset(symndx, got_type, got_offset); | |
1343 | rel_dyn->add_local(object, symndx, r_type, this, got_offset); | |
7bf1f802 ILT |
1344 | } |
1345 | ||
1346 | template<int size, bool big_endian> | |
1347 | void | |
0a65a3a7 CC |
1348 | Output_data_got<size, big_endian>::add_local_with_rela( |
1349 | Sized_relobj<size, big_endian>* object, | |
1350 | unsigned int symndx, | |
1351 | unsigned int got_type, | |
7bf1f802 ILT |
1352 | Rela_dyn* rela_dyn, |
1353 | unsigned int r_type) | |
1354 | { | |
0a65a3a7 | 1355 | if (object->local_has_got_offset(symndx, got_type)) |
7bf1f802 ILT |
1356 | return; |
1357 | ||
1358 | this->entries_.push_back(Got_entry()); | |
1359 | this->set_got_size(); | |
2ea97941 ILT |
1360 | unsigned int got_offset = this->last_got_offset(); |
1361 | object->set_local_got_offset(symndx, got_type, got_offset); | |
1362 | rela_dyn->add_local(object, symndx, r_type, this, got_offset, 0); | |
07f397ab ILT |
1363 | } |
1364 | ||
0a65a3a7 CC |
1365 | // Add a pair of entries for a local symbol to the GOT, and add |
1366 | // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively. | |
1367 | // If R_TYPE_2 == 0, add the second entry with no relocation. | |
7bf1f802 ILT |
1368 | template<int size, bool big_endian> |
1369 | void | |
0a65a3a7 | 1370 | Output_data_got<size, big_endian>::add_local_pair_with_rel( |
7bf1f802 ILT |
1371 | Sized_relobj<size, big_endian>* object, |
1372 | unsigned int symndx, | |
1373 | unsigned int shndx, | |
0a65a3a7 | 1374 | unsigned int got_type, |
7bf1f802 | 1375 | Rel_dyn* rel_dyn, |
0a65a3a7 CC |
1376 | unsigned int r_type_1, |
1377 | unsigned int r_type_2) | |
7bf1f802 | 1378 | { |
0a65a3a7 | 1379 | if (object->local_has_got_offset(symndx, got_type)) |
7bf1f802 ILT |
1380 | return; |
1381 | ||
1382 | this->entries_.push_back(Got_entry()); | |
2ea97941 ILT |
1383 | unsigned int got_offset = this->last_got_offset(); |
1384 | object->set_local_got_offset(symndx, got_type, got_offset); | |
ef9beddf | 1385 | Output_section* os = object->output_section(shndx); |
2ea97941 | 1386 | rel_dyn->add_output_section(os, r_type_1, this, got_offset); |
7bf1f802 | 1387 | |
0a65a3a7 CC |
1388 | this->entries_.push_back(Got_entry(object, symndx)); |
1389 | if (r_type_2 != 0) | |
1390 | { | |
2ea97941 ILT |
1391 | got_offset = this->last_got_offset(); |
1392 | rel_dyn->add_output_section(os, r_type_2, this, got_offset); | |
0a65a3a7 | 1393 | } |
7bf1f802 ILT |
1394 | |
1395 | this->set_got_size(); | |
1396 | } | |
1397 | ||
1398 | template<int size, bool big_endian> | |
1399 | void | |
0a65a3a7 | 1400 | Output_data_got<size, big_endian>::add_local_pair_with_rela( |
7bf1f802 ILT |
1401 | Sized_relobj<size, big_endian>* object, |
1402 | unsigned int symndx, | |
1403 | unsigned int shndx, | |
0a65a3a7 | 1404 | unsigned int got_type, |
7bf1f802 | 1405 | Rela_dyn* rela_dyn, |
0a65a3a7 CC |
1406 | unsigned int r_type_1, |
1407 | unsigned int r_type_2) | |
7bf1f802 | 1408 | { |
0a65a3a7 | 1409 | if (object->local_has_got_offset(symndx, got_type)) |
7bf1f802 ILT |
1410 | return; |
1411 | ||
1412 | this->entries_.push_back(Got_entry()); | |
2ea97941 ILT |
1413 | unsigned int got_offset = this->last_got_offset(); |
1414 | object->set_local_got_offset(symndx, got_type, got_offset); | |
ef9beddf | 1415 | Output_section* os = object->output_section(shndx); |
2ea97941 | 1416 | rela_dyn->add_output_section(os, r_type_1, this, got_offset, 0); |
7bf1f802 | 1417 | |
0a65a3a7 CC |
1418 | this->entries_.push_back(Got_entry(object, symndx)); |
1419 | if (r_type_2 != 0) | |
1420 | { | |
2ea97941 ILT |
1421 | got_offset = this->last_got_offset(); |
1422 | rela_dyn->add_output_section(os, r_type_2, this, got_offset, 0); | |
0a65a3a7 | 1423 | } |
7bf1f802 ILT |
1424 | |
1425 | this->set_got_size(); | |
1426 | } | |
1427 | ||
ead1e424 ILT |
1428 | // Write out the GOT. |
1429 | ||
1430 | template<int size, bool big_endian> | |
1431 | void | |
dbe717ef | 1432 | Output_data_got<size, big_endian>::do_write(Output_file* of) |
ead1e424 ILT |
1433 | { |
1434 | const int add = size / 8; | |
1435 | ||
1436 | const off_t off = this->offset(); | |
c06b7b0b | 1437 | const off_t oview_size = this->data_size(); |
ead1e424 ILT |
1438 | unsigned char* const oview = of->get_output_view(off, oview_size); |
1439 | ||
1440 | unsigned char* pov = oview; | |
1441 | for (typename Got_entries::const_iterator p = this->entries_.begin(); | |
1442 | p != this->entries_.end(); | |
1443 | ++p) | |
1444 | { | |
7e1edb90 | 1445 | p->write(pov); |
ead1e424 ILT |
1446 | pov += add; |
1447 | } | |
1448 | ||
a3ad94ed | 1449 | gold_assert(pov - oview == oview_size); |
c06b7b0b | 1450 | |
ead1e424 ILT |
1451 | of->write_output_view(off, oview_size, oview); |
1452 | ||
1453 | // We no longer need the GOT entries. | |
1454 | this->entries_.clear(); | |
1455 | } | |
1456 | ||
a3ad94ed ILT |
1457 | // Output_data_dynamic::Dynamic_entry methods. |
1458 | ||
1459 | // Write out the entry. | |
1460 | ||
1461 | template<int size, bool big_endian> | |
1462 | void | |
1463 | Output_data_dynamic::Dynamic_entry::write( | |
1464 | unsigned char* pov, | |
7d1a9ebb | 1465 | const Stringpool* pool) const |
a3ad94ed ILT |
1466 | { |
1467 | typename elfcpp::Elf_types<size>::Elf_WXword val; | |
c2b45e22 | 1468 | switch (this->offset_) |
a3ad94ed ILT |
1469 | { |
1470 | case DYNAMIC_NUMBER: | |
1471 | val = this->u_.val; | |
1472 | break; | |
1473 | ||
a3ad94ed | 1474 | case DYNAMIC_SECTION_SIZE: |
16649710 | 1475 | val = this->u_.od->data_size(); |
a3ad94ed ILT |
1476 | break; |
1477 | ||
1478 | case DYNAMIC_SYMBOL: | |
1479 | { | |
16649710 ILT |
1480 | const Sized_symbol<size>* s = |
1481 | static_cast<const Sized_symbol<size>*>(this->u_.sym); | |
a3ad94ed ILT |
1482 | val = s->value(); |
1483 | } | |
1484 | break; | |
1485 | ||
1486 | case DYNAMIC_STRING: | |
1487 | val = pool->get_offset(this->u_.str); | |
1488 | break; | |
1489 | ||
1490 | default: | |
c2b45e22 CC |
1491 | val = this->u_.od->address() + this->offset_; |
1492 | break; | |
a3ad94ed ILT |
1493 | } |
1494 | ||
1495 | elfcpp::Dyn_write<size, big_endian> dw(pov); | |
1496 | dw.put_d_tag(this->tag_); | |
1497 | dw.put_d_val(val); | |
1498 | } | |
1499 | ||
1500 | // Output_data_dynamic methods. | |
1501 | ||
16649710 ILT |
1502 | // Adjust the output section to set the entry size. |
1503 | ||
1504 | void | |
1505 | Output_data_dynamic::do_adjust_output_section(Output_section* os) | |
1506 | { | |
8851ecca | 1507 | if (parameters->target().get_size() == 32) |
16649710 | 1508 | os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size); |
8851ecca | 1509 | else if (parameters->target().get_size() == 64) |
16649710 ILT |
1510 | os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size); |
1511 | else | |
1512 | gold_unreachable(); | |
1513 | } | |
1514 | ||
a3ad94ed ILT |
1515 | // Set the final data size. |
1516 | ||
1517 | void | |
27bc2bce | 1518 | Output_data_dynamic::set_final_data_size() |
a3ad94ed | 1519 | { |
20e6d0d6 DK |
1520 | // Add the terminating entry if it hasn't been added. |
1521 | // Because of relaxation, we can run this multiple times. | |
1522 | if (this->entries_.empty() | |
1523 | || this->entries_.rbegin()->tag() != elfcpp::DT_NULL) | |
1524 | this->add_constant(elfcpp::DT_NULL, 0); | |
a3ad94ed ILT |
1525 | |
1526 | int dyn_size; | |
8851ecca | 1527 | if (parameters->target().get_size() == 32) |
a3ad94ed | 1528 | dyn_size = elfcpp::Elf_sizes<32>::dyn_size; |
8851ecca | 1529 | else if (parameters->target().get_size() == 64) |
a3ad94ed ILT |
1530 | dyn_size = elfcpp::Elf_sizes<64>::dyn_size; |
1531 | else | |
1532 | gold_unreachable(); | |
1533 | this->set_data_size(this->entries_.size() * dyn_size); | |
1534 | } | |
1535 | ||
1536 | // Write out the dynamic entries. | |
1537 | ||
1538 | void | |
1539 | Output_data_dynamic::do_write(Output_file* of) | |
1540 | { | |
8851ecca | 1541 | switch (parameters->size_and_endianness()) |
a3ad94ed | 1542 | { |
9025d29d | 1543 | #ifdef HAVE_TARGET_32_LITTLE |
8851ecca ILT |
1544 | case Parameters::TARGET_32_LITTLE: |
1545 | this->sized_write<32, false>(of); | |
1546 | break; | |
9025d29d | 1547 | #endif |
8851ecca ILT |
1548 | #ifdef HAVE_TARGET_32_BIG |
1549 | case Parameters::TARGET_32_BIG: | |
1550 | this->sized_write<32, true>(of); | |
1551 | break; | |
9025d29d | 1552 | #endif |
9025d29d | 1553 | #ifdef HAVE_TARGET_64_LITTLE |
8851ecca ILT |
1554 | case Parameters::TARGET_64_LITTLE: |
1555 | this->sized_write<64, false>(of); | |
1556 | break; | |
9025d29d | 1557 | #endif |
8851ecca ILT |
1558 | #ifdef HAVE_TARGET_64_BIG |
1559 | case Parameters::TARGET_64_BIG: | |
1560 | this->sized_write<64, true>(of); | |
1561 | break; | |
1562 | #endif | |
1563 | default: | |
1564 | gold_unreachable(); | |
a3ad94ed | 1565 | } |
a3ad94ed ILT |
1566 | } |
1567 | ||
1568 | template<int size, bool big_endian> | |
1569 | void | |
1570 | Output_data_dynamic::sized_write(Output_file* of) | |
1571 | { | |
1572 | const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size; | |
1573 | ||
2ea97941 | 1574 | const off_t offset = this->offset(); |
a3ad94ed | 1575 | const off_t oview_size = this->data_size(); |
2ea97941 | 1576 | unsigned char* const oview = of->get_output_view(offset, oview_size); |
a3ad94ed ILT |
1577 | |
1578 | unsigned char* pov = oview; | |
1579 | for (typename Dynamic_entries::const_iterator p = this->entries_.begin(); | |
1580 | p != this->entries_.end(); | |
1581 | ++p) | |
1582 | { | |
7d1a9ebb | 1583 | p->write<size, big_endian>(pov, this->pool_); |
a3ad94ed ILT |
1584 | pov += dyn_size; |
1585 | } | |
1586 | ||
1587 | gold_assert(pov - oview == oview_size); | |
1588 | ||
2ea97941 | 1589 | of->write_output_view(offset, oview_size, oview); |
a3ad94ed ILT |
1590 | |
1591 | // We no longer need the dynamic entries. | |
1592 | this->entries_.clear(); | |
1593 | } | |
1594 | ||
d491d34e ILT |
1595 | // Class Output_symtab_xindex. |
1596 | ||
1597 | void | |
1598 | Output_symtab_xindex::do_write(Output_file* of) | |
1599 | { | |
2ea97941 | 1600 | const off_t offset = this->offset(); |
d491d34e | 1601 | const off_t oview_size = this->data_size(); |
2ea97941 | 1602 | unsigned char* const oview = of->get_output_view(offset, oview_size); |
d491d34e ILT |
1603 | |
1604 | memset(oview, 0, oview_size); | |
1605 | ||
1606 | if (parameters->target().is_big_endian()) | |
1607 | this->endian_do_write<true>(oview); | |
1608 | else | |
1609 | this->endian_do_write<false>(oview); | |
1610 | ||
2ea97941 | 1611 | of->write_output_view(offset, oview_size, oview); |
d491d34e ILT |
1612 | |
1613 | // We no longer need the data. | |
1614 | this->entries_.clear(); | |
1615 | } | |
1616 | ||
1617 | template<bool big_endian> | |
1618 | void | |
1619 | Output_symtab_xindex::endian_do_write(unsigned char* const oview) | |
1620 | { | |
1621 | for (Xindex_entries::const_iterator p = this->entries_.begin(); | |
1622 | p != this->entries_.end(); | |
1623 | ++p) | |
20e6d0d6 DK |
1624 | { |
1625 | unsigned int symndx = p->first; | |
1626 | gold_assert(symndx * 4 < this->data_size()); | |
1627 | elfcpp::Swap<32, big_endian>::writeval(oview + symndx * 4, p->second); | |
1628 | } | |
d491d34e ILT |
1629 | } |
1630 | ||
ead1e424 ILT |
1631 | // Output_section::Input_section methods. |
1632 | ||
1633 | // Return the data size. For an input section we store the size here. | |
1634 | // For an Output_section_data, we have to ask it for the size. | |
1635 | ||
1636 | off_t | |
1637 | Output_section::Input_section::data_size() const | |
1638 | { | |
1639 | if (this->is_input_section()) | |
b8e6aad9 | 1640 | return this->u1_.data_size; |
ead1e424 | 1641 | else |
b8e6aad9 | 1642 | return this->u2_.posd->data_size(); |
ead1e424 ILT |
1643 | } |
1644 | ||
1645 | // Set the address and file offset. | |
1646 | ||
1647 | void | |
96803768 ILT |
1648 | Output_section::Input_section::set_address_and_file_offset( |
1649 | uint64_t address, | |
1650 | off_t file_offset, | |
1651 | off_t section_file_offset) | |
ead1e424 ILT |
1652 | { |
1653 | if (this->is_input_section()) | |
96803768 ILT |
1654 | this->u2_.object->set_section_offset(this->shndx_, |
1655 | file_offset - section_file_offset); | |
ead1e424 | 1656 | else |
96803768 ILT |
1657 | this->u2_.posd->set_address_and_file_offset(address, file_offset); |
1658 | } | |
1659 | ||
a445fddf ILT |
1660 | // Reset the address and file offset. |
1661 | ||
1662 | void | |
1663 | Output_section::Input_section::reset_address_and_file_offset() | |
1664 | { | |
1665 | if (!this->is_input_section()) | |
1666 | this->u2_.posd->reset_address_and_file_offset(); | |
1667 | } | |
1668 | ||
96803768 ILT |
1669 | // Finalize the data size. |
1670 | ||
1671 | void | |
1672 | Output_section::Input_section::finalize_data_size() | |
1673 | { | |
1674 | if (!this->is_input_section()) | |
1675 | this->u2_.posd->finalize_data_size(); | |
b8e6aad9 ILT |
1676 | } |
1677 | ||
1e983657 ILT |
1678 | // Try to turn an input offset into an output offset. We want to |
1679 | // return the output offset relative to the start of this | |
1680 | // Input_section in the output section. | |
b8e6aad9 | 1681 | |
8f00aeb8 | 1682 | inline bool |
8383303e ILT |
1683 | Output_section::Input_section::output_offset( |
1684 | const Relobj* object, | |
2ea97941 ILT |
1685 | unsigned int shndx, |
1686 | section_offset_type offset, | |
8383303e | 1687 | section_offset_type *poutput) const |
b8e6aad9 ILT |
1688 | { |
1689 | if (!this->is_input_section()) | |
2ea97941 | 1690 | return this->u2_.posd->output_offset(object, shndx, offset, poutput); |
b8e6aad9 ILT |
1691 | else |
1692 | { | |
2ea97941 | 1693 | if (this->shndx_ != shndx || this->u2_.object != object) |
b8e6aad9 | 1694 | return false; |
2ea97941 | 1695 | *poutput = offset; |
b8e6aad9 ILT |
1696 | return true; |
1697 | } | |
ead1e424 ILT |
1698 | } |
1699 | ||
a9a60db6 ILT |
1700 | // Return whether this is the merge section for the input section |
1701 | // SHNDX in OBJECT. | |
1702 | ||
1703 | inline bool | |
1704 | Output_section::Input_section::is_merge_section_for(const Relobj* object, | |
2ea97941 | 1705 | unsigned int shndx) const |
a9a60db6 ILT |
1706 | { |
1707 | if (this->is_input_section()) | |
1708 | return false; | |
2ea97941 | 1709 | return this->u2_.posd->is_merge_section_for(object, shndx); |
a9a60db6 ILT |
1710 | } |
1711 | ||
ead1e424 ILT |
1712 | // Write out the data. We don't have to do anything for an input |
1713 | // section--they are handled via Object::relocate--but this is where | |
1714 | // we write out the data for an Output_section_data. | |
1715 | ||
1716 | void | |
1717 | Output_section::Input_section::write(Output_file* of) | |
1718 | { | |
1719 | if (!this->is_input_section()) | |
b8e6aad9 | 1720 | this->u2_.posd->write(of); |
ead1e424 ILT |
1721 | } |
1722 | ||
96803768 ILT |
1723 | // Write the data to a buffer. As for write(), we don't have to do |
1724 | // anything for an input section. | |
1725 | ||
1726 | void | |
1727 | Output_section::Input_section::write_to_buffer(unsigned char* buffer) | |
1728 | { | |
1729 | if (!this->is_input_section()) | |
1730 | this->u2_.posd->write_to_buffer(buffer); | |
1731 | } | |
1732 | ||
7d9e3d98 ILT |
1733 | // Print to a map file. |
1734 | ||
1735 | void | |
1736 | Output_section::Input_section::print_to_mapfile(Mapfile* mapfile) const | |
1737 | { | |
1738 | switch (this->shndx_) | |
1739 | { | |
1740 | case OUTPUT_SECTION_CODE: | |
1741 | case MERGE_DATA_SECTION_CODE: | |
1742 | case MERGE_STRING_SECTION_CODE: | |
1743 | this->u2_.posd->print_to_mapfile(mapfile); | |
1744 | break; | |
1745 | ||
20e6d0d6 DK |
1746 | case RELAXED_INPUT_SECTION_CODE: |
1747 | { | |
1748 | Output_relaxed_input_section* relaxed_section = | |
1749 | this->relaxed_input_section(); | |
1750 | mapfile->print_input_section(relaxed_section->relobj(), | |
1751 | relaxed_section->shndx()); | |
1752 | } | |
1753 | break; | |
7d9e3d98 ILT |
1754 | default: |
1755 | mapfile->print_input_section(this->u2_.object, this->shndx_); | |
1756 | break; | |
1757 | } | |
1758 | } | |
1759 | ||
a2fb1b05 ILT |
1760 | // Output_section methods. |
1761 | ||
1762 | // Construct an Output_section. NAME will point into a Stringpool. | |
1763 | ||
2ea97941 ILT |
1764 | Output_section::Output_section(const char* name, elfcpp::Elf_Word type, |
1765 | elfcpp::Elf_Xword flags) | |
1766 | : name_(name), | |
a2fb1b05 ILT |
1767 | addralign_(0), |
1768 | entsize_(0), | |
a445fddf | 1769 | load_address_(0), |
16649710 | 1770 | link_section_(NULL), |
a2fb1b05 | 1771 | link_(0), |
16649710 | 1772 | info_section_(NULL), |
6a74a719 | 1773 | info_symndx_(NULL), |
a2fb1b05 | 1774 | info_(0), |
2ea97941 ILT |
1775 | type_(type), |
1776 | flags_(flags), | |
91ea499d | 1777 | out_shndx_(-1U), |
c06b7b0b ILT |
1778 | symtab_index_(0), |
1779 | dynsym_index_(0), | |
ead1e424 ILT |
1780 | input_sections_(), |
1781 | first_input_offset_(0), | |
c51e6221 | 1782 | fills_(), |
96803768 | 1783 | postprocessing_buffer_(NULL), |
a3ad94ed | 1784 | needs_symtab_index_(false), |
16649710 ILT |
1785 | needs_dynsym_index_(false), |
1786 | should_link_to_symtab_(false), | |
730cdc88 | 1787 | should_link_to_dynsym_(false), |
27bc2bce | 1788 | after_input_sections_(false), |
7bf1f802 | 1789 | requires_postprocessing_(false), |
a445fddf ILT |
1790 | found_in_sections_clause_(false), |
1791 | has_load_address_(false), | |
755ab8af | 1792 | info_uses_section_index_(false), |
2fd32231 ILT |
1793 | may_sort_attached_input_sections_(false), |
1794 | must_sort_attached_input_sections_(false), | |
1795 | attached_input_sections_are_sorted_(false), | |
9f1d377b ILT |
1796 | is_relro_(false), |
1797 | is_relro_local_(false), | |
1a2dff53 ILT |
1798 | is_last_relro_(false), |
1799 | is_first_non_relro_(false), | |
8a5e3e08 ILT |
1800 | is_small_section_(false), |
1801 | is_large_section_(false), | |
f5c870d2 ILT |
1802 | is_interp_(false), |
1803 | is_dynamic_linker_section_(false), | |
1804 | generate_code_fills_at_write_(false), | |
e8cd95c7 | 1805 | is_entsize_zero_(false), |
20e6d0d6 | 1806 | tls_offset_(0), |
c0a62865 DK |
1807 | checkpoint_(NULL), |
1808 | merge_section_map_(), | |
1809 | merge_section_by_properties_map_(), | |
1810 | relaxed_input_section_map_(), | |
f5c870d2 | 1811 | is_relaxed_input_section_map_valid_(true) |
a2fb1b05 | 1812 | { |
27bc2bce ILT |
1813 | // An unallocated section has no address. Forcing this means that |
1814 | // we don't need special treatment for symbols defined in debug | |
1815 | // sections. | |
2ea97941 | 1816 | if ((flags & elfcpp::SHF_ALLOC) == 0) |
27bc2bce | 1817 | this->set_address(0); |
a2fb1b05 ILT |
1818 | } |
1819 | ||
54dc6425 ILT |
1820 | Output_section::~Output_section() |
1821 | { | |
20e6d0d6 | 1822 | delete this->checkpoint_; |
54dc6425 ILT |
1823 | } |
1824 | ||
16649710 ILT |
1825 | // Set the entry size. |
1826 | ||
1827 | void | |
1828 | Output_section::set_entsize(uint64_t v) | |
1829 | { | |
e8cd95c7 ILT |
1830 | if (this->is_entsize_zero_) |
1831 | ; | |
1832 | else if (this->entsize_ == 0) | |
16649710 | 1833 | this->entsize_ = v; |
e8cd95c7 ILT |
1834 | else if (this->entsize_ != v) |
1835 | { | |
1836 | this->entsize_ = 0; | |
1837 | this->is_entsize_zero_ = 1; | |
1838 | } | |
16649710 ILT |
1839 | } |
1840 | ||
ead1e424 | 1841 | // Add the input section SHNDX, with header SHDR, named SECNAME, in |
730cdc88 ILT |
1842 | // OBJECT, to the Output_section. RELOC_SHNDX is the index of a |
1843 | // relocation section which applies to this section, or 0 if none, or | |
1844 | // -1U if more than one. Return the offset of the input section | |
1845 | // within the output section. Return -1 if the input section will | |
1846 | // receive special handling. In the normal case we don't always keep | |
1847 | // track of input sections for an Output_section. Instead, each | |
1848 | // Object keeps track of the Output_section for each of its input | |
a445fddf ILT |
1849 | // sections. However, if HAVE_SECTIONS_SCRIPT is true, we do keep |
1850 | // track of input sections here; this is used when SECTIONS appears in | |
1851 | // a linker script. | |
a2fb1b05 ILT |
1852 | |
1853 | template<int size, bool big_endian> | |
1854 | off_t | |
730cdc88 | 1855 | Output_section::add_input_section(Sized_relobj<size, big_endian>* object, |
2ea97941 | 1856 | unsigned int shndx, |
ead1e424 | 1857 | const char* secname, |
730cdc88 | 1858 | const elfcpp::Shdr<size, big_endian>& shdr, |
a445fddf ILT |
1859 | unsigned int reloc_shndx, |
1860 | bool have_sections_script) | |
a2fb1b05 | 1861 | { |
2ea97941 ILT |
1862 | elfcpp::Elf_Xword addralign = shdr.get_sh_addralign(); |
1863 | if ((addralign & (addralign - 1)) != 0) | |
a2fb1b05 | 1864 | { |
75f2446e | 1865 | object->error(_("invalid alignment %lu for section \"%s\""), |
2ea97941 ILT |
1866 | static_cast<unsigned long>(addralign), secname); |
1867 | addralign = 1; | |
a2fb1b05 | 1868 | } |
a2fb1b05 | 1869 | |
2ea97941 ILT |
1870 | if (addralign > this->addralign_) |
1871 | this->addralign_ = addralign; | |
a2fb1b05 | 1872 | |
44a43cf9 | 1873 | typename elfcpp::Elf_types<size>::Elf_WXword sh_flags = shdr.get_sh_flags(); |
2ea97941 | 1874 | uint64_t entsize = shdr.get_sh_entsize(); |
44a43cf9 ILT |
1875 | |
1876 | // .debug_str is a mergeable string section, but is not always so | |
1877 | // marked by compilers. Mark manually here so we can optimize. | |
1878 | if (strcmp(secname, ".debug_str") == 0) | |
4f833eee ILT |
1879 | { |
1880 | sh_flags |= (elfcpp::SHF_MERGE | elfcpp::SHF_STRINGS); | |
2ea97941 | 1881 | entsize = 1; |
4f833eee | 1882 | } |
44a43cf9 | 1883 | |
e8cd95c7 ILT |
1884 | this->update_flags_for_input_section(sh_flags); |
1885 | this->set_entsize(entsize); | |
1886 | ||
b8e6aad9 | 1887 | // If this is a SHF_MERGE section, we pass all the input sections to |
730cdc88 | 1888 | // a Output_data_merge. We don't try to handle relocations for such |
e0b64032 ILT |
1889 | // a section. We don't try to handle empty merge sections--they |
1890 | // mess up the mappings, and are useless anyhow. | |
44a43cf9 | 1891 | if ((sh_flags & elfcpp::SHF_MERGE) != 0 |
e0b64032 ILT |
1892 | && reloc_shndx == 0 |
1893 | && shdr.get_sh_size() > 0) | |
b8e6aad9 | 1894 | { |
2ea97941 ILT |
1895 | if (this->add_merge_input_section(object, shndx, sh_flags, |
1896 | entsize, addralign)) | |
b8e6aad9 ILT |
1897 | { |
1898 | // Tell the relocation routines that they need to call the | |
730cdc88 | 1899 | // output_offset method to determine the final address. |
b8e6aad9 ILT |
1900 | return -1; |
1901 | } | |
1902 | } | |
1903 | ||
27bc2bce | 1904 | off_t offset_in_section = this->current_data_size_for_child(); |
c51e6221 | 1905 | off_t aligned_offset_in_section = align_address(offset_in_section, |
2ea97941 | 1906 | addralign); |
c51e6221 | 1907 | |
c0a62865 DK |
1908 | // Determine if we want to delay code-fill generation until the output |
1909 | // section is written. When the target is relaxing, we want to delay fill | |
1910 | // generating to avoid adjusting them during relaxation. | |
1911 | if (!this->generate_code_fills_at_write_ | |
1912 | && !have_sections_script | |
1913 | && (sh_flags & elfcpp::SHF_EXECINSTR) != 0 | |
1914 | && parameters->target().has_code_fill() | |
1915 | && parameters->target().may_relax()) | |
1916 | { | |
1917 | gold_assert(this->fills_.empty()); | |
1918 | this->generate_code_fills_at_write_ = true; | |
1919 | } | |
1920 | ||
c51e6221 | 1921 | if (aligned_offset_in_section > offset_in_section |
c0a62865 | 1922 | && !this->generate_code_fills_at_write_ |
a445fddf | 1923 | && !have_sections_script |
44a43cf9 | 1924 | && (sh_flags & elfcpp::SHF_EXECINSTR) != 0 |
029ba973 | 1925 | && parameters->target().has_code_fill()) |
c51e6221 ILT |
1926 | { |
1927 | // We need to add some fill data. Using fill_list_ when | |
1928 | // possible is an optimization, since we will often have fill | |
1929 | // sections without input sections. | |
1930 | off_t fill_len = aligned_offset_in_section - offset_in_section; | |
1931 | if (this->input_sections_.empty()) | |
1932 | this->fills_.push_back(Fill(offset_in_section, fill_len)); | |
1933 | else | |
1934 | { | |
029ba973 | 1935 | std::string fill_data(parameters->target().code_fill(fill_len)); |
c51e6221 ILT |
1936 | Output_data_const* odc = new Output_data_const(fill_data, 1); |
1937 | this->input_sections_.push_back(Input_section(odc)); | |
1938 | } | |
1939 | } | |
1940 | ||
27bc2bce ILT |
1941 | this->set_current_data_size_for_child(aligned_offset_in_section |
1942 | + shdr.get_sh_size()); | |
a2fb1b05 | 1943 | |
ead1e424 | 1944 | // We need to keep track of this section if we are already keeping |
2fd32231 ILT |
1945 | // track of sections, or if we are relaxing. Also, if this is a |
1946 | // section which requires sorting, or which may require sorting in | |
20e6d0d6 | 1947 | // the future, we keep track of the sections. |
2fd32231 ILT |
1948 | if (have_sections_script |
1949 | || !this->input_sections_.empty() | |
1950 | || this->may_sort_attached_input_sections() | |
7d9e3d98 | 1951 | || this->must_sort_attached_input_sections() |
20e6d0d6 | 1952 | || parameters->options().user_set_Map() |
029ba973 | 1953 | || parameters->target().may_relax()) |
2ea97941 | 1954 | this->input_sections_.push_back(Input_section(object, shndx, |
ead1e424 | 1955 | shdr.get_sh_size(), |
2ea97941 | 1956 | addralign)); |
54dc6425 | 1957 | |
c51e6221 | 1958 | return aligned_offset_in_section; |
61ba1cf9 ILT |
1959 | } |
1960 | ||
ead1e424 ILT |
1961 | // Add arbitrary data to an output section. |
1962 | ||
1963 | void | |
1964 | Output_section::add_output_section_data(Output_section_data* posd) | |
1965 | { | |
b8e6aad9 ILT |
1966 | Input_section inp(posd); |
1967 | this->add_output_section_data(&inp); | |
a445fddf ILT |
1968 | |
1969 | if (posd->is_data_size_valid()) | |
1970 | { | |
1971 | off_t offset_in_section = this->current_data_size_for_child(); | |
1972 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
1973 | posd->addralign()); | |
1974 | this->set_current_data_size_for_child(aligned_offset_in_section | |
1975 | + posd->data_size()); | |
1976 | } | |
b8e6aad9 ILT |
1977 | } |
1978 | ||
c0a62865 DK |
1979 | // Add a relaxed input section. |
1980 | ||
1981 | void | |
1982 | Output_section::add_relaxed_input_section(Output_relaxed_input_section* poris) | |
1983 | { | |
1984 | Input_section inp(poris); | |
1985 | this->add_output_section_data(&inp); | |
1986 | if (this->is_relaxed_input_section_map_valid_) | |
1987 | { | |
1988 | Input_section_specifier iss(poris->relobj(), poris->shndx()); | |
1989 | this->relaxed_input_section_map_[iss] = poris; | |
1990 | } | |
1991 | ||
1992 | // For a relaxed section, we use the current data size. Linker scripts | |
1993 | // get all the input sections, including relaxed one from an output | |
1994 | // section and add them back to them same output section to compute the | |
1995 | // output section size. If we do not account for sizes of relaxed input | |
1996 | // sections, an output section would be incorrectly sized. | |
1997 | off_t offset_in_section = this->current_data_size_for_child(); | |
1998 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
1999 | poris->addralign()); | |
2000 | this->set_current_data_size_for_child(aligned_offset_in_section | |
2001 | + poris->current_data_size()); | |
2002 | } | |
2003 | ||
b8e6aad9 | 2004 | // Add arbitrary data to an output section by Input_section. |
c06b7b0b | 2005 | |
b8e6aad9 ILT |
2006 | void |
2007 | Output_section::add_output_section_data(Input_section* inp) | |
2008 | { | |
ead1e424 | 2009 | if (this->input_sections_.empty()) |
27bc2bce | 2010 | this->first_input_offset_ = this->current_data_size_for_child(); |
c06b7b0b | 2011 | |
b8e6aad9 | 2012 | this->input_sections_.push_back(*inp); |
c06b7b0b | 2013 | |
2ea97941 ILT |
2014 | uint64_t addralign = inp->addralign(); |
2015 | if (addralign > this->addralign_) | |
2016 | this->addralign_ = addralign; | |
c06b7b0b | 2017 | |
b8e6aad9 ILT |
2018 | inp->set_output_section(this); |
2019 | } | |
2020 | ||
2021 | // Add a merge section to an output section. | |
2022 | ||
2023 | void | |
2024 | Output_section::add_output_merge_section(Output_section_data* posd, | |
2ea97941 | 2025 | bool is_string, uint64_t entsize) |
b8e6aad9 | 2026 | { |
2ea97941 | 2027 | Input_section inp(posd, is_string, entsize); |
b8e6aad9 ILT |
2028 | this->add_output_section_data(&inp); |
2029 | } | |
2030 | ||
2031 | // Add an input section to a SHF_MERGE section. | |
2032 | ||
2033 | bool | |
2ea97941 ILT |
2034 | Output_section::add_merge_input_section(Relobj* object, unsigned int shndx, |
2035 | uint64_t flags, uint64_t entsize, | |
2036 | uint64_t addralign) | |
b8e6aad9 | 2037 | { |
2ea97941 | 2038 | bool is_string = (flags & elfcpp::SHF_STRINGS) != 0; |
87f95776 ILT |
2039 | |
2040 | // We only merge strings if the alignment is not more than the | |
2041 | // character size. This could be handled, but it's unusual. | |
2ea97941 | 2042 | if (is_string && addralign > entsize) |
b8e6aad9 ILT |
2043 | return false; |
2044 | ||
20e6d0d6 DK |
2045 | // We cannot restore merged input section states. |
2046 | gold_assert(this->checkpoint_ == NULL); | |
2047 | ||
c0a62865 | 2048 | // Look up merge sections by required properties. |
2ea97941 | 2049 | Merge_section_properties msp(is_string, entsize, addralign); |
c0a62865 DK |
2050 | Merge_section_by_properties_map::const_iterator p = |
2051 | this->merge_section_by_properties_map_.find(msp); | |
2052 | if (p != this->merge_section_by_properties_map_.end()) | |
2053 | { | |
2054 | Output_merge_base* merge_section = p->second; | |
2ea97941 | 2055 | merge_section->add_input_section(object, shndx); |
c0a62865 | 2056 | gold_assert(merge_section->is_string() == is_string |
2ea97941 ILT |
2057 | && merge_section->entsize() == entsize |
2058 | && merge_section->addralign() == addralign); | |
c0a62865 DK |
2059 | |
2060 | // Link input section to found merge section. | |
2ea97941 | 2061 | Input_section_specifier iss(object, shndx); |
c0a62865 DK |
2062 | this->merge_section_map_[iss] = merge_section; |
2063 | return true; | |
2064 | } | |
b8e6aad9 ILT |
2065 | |
2066 | // We handle the actual constant merging in Output_merge_data or | |
2067 | // Output_merge_string_data. | |
c0a62865 | 2068 | Output_merge_base* pomb; |
9a0910c3 | 2069 | if (!is_string) |
2ea97941 | 2070 | pomb = new Output_merge_data(entsize, addralign); |
b8e6aad9 ILT |
2071 | else |
2072 | { | |
2ea97941 | 2073 | switch (entsize) |
9a0910c3 ILT |
2074 | { |
2075 | case 1: | |
2ea97941 | 2076 | pomb = new Output_merge_string<char>(addralign); |
9a0910c3 ILT |
2077 | break; |
2078 | case 2: | |
2ea97941 | 2079 | pomb = new Output_merge_string<uint16_t>(addralign); |
9a0910c3 ILT |
2080 | break; |
2081 | case 4: | |
2ea97941 | 2082 | pomb = new Output_merge_string<uint32_t>(addralign); |
9a0910c3 ILT |
2083 | break; |
2084 | default: | |
2085 | return false; | |
2086 | } | |
b8e6aad9 ILT |
2087 | } |
2088 | ||
c0a62865 DK |
2089 | // Add new merge section to this output section and link merge section |
2090 | // properties to new merge section in map. | |
2ea97941 | 2091 | this->add_output_merge_section(pomb, is_string, entsize); |
c0a62865 DK |
2092 | this->merge_section_by_properties_map_[msp] = pomb; |
2093 | ||
2094 | // Add input section to new merge section and link input section to new | |
2095 | // merge section in map. | |
2ea97941 ILT |
2096 | pomb->add_input_section(object, shndx); |
2097 | Input_section_specifier iss(object, shndx); | |
c0a62865 | 2098 | this->merge_section_map_[iss] = pomb; |
9a0910c3 | 2099 | |
b8e6aad9 ILT |
2100 | return true; |
2101 | } | |
2102 | ||
c0a62865 | 2103 | // Build a relaxation map to speed up relaxation of existing input sections. |
2ea97941 | 2104 | // Look up to the first LIMIT elements in INPUT_SECTIONS. |
c0a62865 | 2105 | |
20e6d0d6 | 2106 | void |
c0a62865 | 2107 | Output_section::build_relaxation_map( |
2ea97941 | 2108 | const Input_section_list& input_sections, |
c0a62865 DK |
2109 | size_t limit, |
2110 | Relaxation_map* relaxation_map) const | |
20e6d0d6 | 2111 | { |
c0a62865 DK |
2112 | for (size_t i = 0; i < limit; ++i) |
2113 | { | |
2ea97941 | 2114 | const Input_section& is(input_sections[i]); |
c0a62865 DK |
2115 | if (is.is_input_section() || is.is_relaxed_input_section()) |
2116 | { | |
2117 | Input_section_specifier iss(is.relobj(), is.shndx()); | |
2118 | (*relaxation_map)[iss] = i; | |
2119 | } | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | // Convert regular input sections in INPUT_SECTIONS into relaxed input | |
2124 | // sections in RELAXED_SECTIONS. MAP is a prebuilt map from input section | |
2ea97941 | 2125 | // specifier to indices of INPUT_SECTIONS. |
20e6d0d6 | 2126 | |
c0a62865 DK |
2127 | void |
2128 | Output_section::convert_input_sections_in_list_to_relaxed_sections( | |
2129 | const std::vector<Output_relaxed_input_section*>& relaxed_sections, | |
2130 | const Relaxation_map& map, | |
2ea97941 | 2131 | Input_section_list* input_sections) |
c0a62865 DK |
2132 | { |
2133 | for (size_t i = 0; i < relaxed_sections.size(); ++i) | |
2134 | { | |
2135 | Output_relaxed_input_section* poris = relaxed_sections[i]; | |
2136 | Input_section_specifier iss(poris->relobj(), poris->shndx()); | |
2137 | Relaxation_map::const_iterator p = map.find(iss); | |
2138 | gold_assert(p != map.end()); | |
2ea97941 ILT |
2139 | gold_assert((*input_sections)[p->second].is_input_section()); |
2140 | (*input_sections)[p->second] = Input_section(poris); | |
c0a62865 DK |
2141 | } |
2142 | } | |
2143 | ||
2144 | // Convert regular input sections into relaxed input sections. RELAXED_SECTIONS | |
2145 | // is a vector of pointers to Output_relaxed_input_section or its derived | |
2146 | // classes. The relaxed sections must correspond to existing input sections. | |
2147 | ||
2148 | void | |
2149 | Output_section::convert_input_sections_to_relaxed_sections( | |
2150 | const std::vector<Output_relaxed_input_section*>& relaxed_sections) | |
2151 | { | |
029ba973 | 2152 | gold_assert(parameters->target().may_relax()); |
20e6d0d6 | 2153 | |
c0a62865 DK |
2154 | // We want to make sure that restore_states does not undo the effect of |
2155 | // this. If there is no checkpoint active, just search the current | |
2156 | // input section list and replace the sections there. If there is | |
2157 | // a checkpoint, also replace the sections there. | |
2158 | ||
2159 | // By default, we look at the whole list. | |
2160 | size_t limit = this->input_sections_.size(); | |
2161 | ||
2162 | if (this->checkpoint_ != NULL) | |
20e6d0d6 | 2163 | { |
c0a62865 DK |
2164 | // Replace input sections with relaxed input section in the saved |
2165 | // copy of the input section list. | |
2166 | if (this->checkpoint_->input_sections_saved()) | |
20e6d0d6 | 2167 | { |
c0a62865 DK |
2168 | Relaxation_map map; |
2169 | this->build_relaxation_map( | |
2170 | *(this->checkpoint_->input_sections()), | |
2171 | this->checkpoint_->input_sections()->size(), | |
2172 | &map); | |
2173 | this->convert_input_sections_in_list_to_relaxed_sections( | |
2174 | relaxed_sections, | |
2175 | map, | |
2176 | this->checkpoint_->input_sections()); | |
2177 | } | |
2178 | else | |
2179 | { | |
2180 | // We have not copied the input section list yet. Instead, just | |
2181 | // look at the portion that would be saved. | |
2182 | limit = this->checkpoint_->input_sections_size(); | |
20e6d0d6 | 2183 | } |
20e6d0d6 | 2184 | } |
c0a62865 DK |
2185 | |
2186 | // Convert input sections in input_section_list. | |
2187 | Relaxation_map map; | |
2188 | this->build_relaxation_map(this->input_sections_, limit, &map); | |
2189 | this->convert_input_sections_in_list_to_relaxed_sections( | |
2190 | relaxed_sections, | |
2191 | map, | |
2192 | &this->input_sections_); | |
20e6d0d6 DK |
2193 | } |
2194 | ||
9c547ec3 ILT |
2195 | // Update the output section flags based on input section flags. |
2196 | ||
2197 | void | |
2ea97941 | 2198 | Output_section::update_flags_for_input_section(elfcpp::Elf_Xword flags) |
9c547ec3 ILT |
2199 | { |
2200 | // If we created the section with SHF_ALLOC clear, we set the | |
2201 | // address. If we are now setting the SHF_ALLOC flag, we need to | |
2202 | // undo that. | |
2203 | if ((this->flags_ & elfcpp::SHF_ALLOC) == 0 | |
2ea97941 | 2204 | && (flags & elfcpp::SHF_ALLOC) != 0) |
9c547ec3 ILT |
2205 | this->mark_address_invalid(); |
2206 | ||
2ea97941 | 2207 | this->flags_ |= (flags |
9c547ec3 ILT |
2208 | & (elfcpp::SHF_WRITE |
2209 | | elfcpp::SHF_ALLOC | |
2210 | | elfcpp::SHF_EXECINSTR)); | |
e8cd95c7 ILT |
2211 | |
2212 | if ((flags & elfcpp::SHF_MERGE) == 0) | |
2213 | this->flags_ &=~ elfcpp::SHF_MERGE; | |
2214 | else | |
2215 | { | |
2216 | if (this->current_data_size_for_child() == 0) | |
2217 | this->flags_ |= elfcpp::SHF_MERGE; | |
2218 | } | |
2219 | ||
2220 | if ((flags & elfcpp::SHF_STRINGS) == 0) | |
2221 | this->flags_ &=~ elfcpp::SHF_STRINGS; | |
2222 | else | |
2223 | { | |
2224 | if (this->current_data_size_for_child() == 0) | |
2225 | this->flags_ |= elfcpp::SHF_STRINGS; | |
2226 | } | |
9c547ec3 ILT |
2227 | } |
2228 | ||
2ea97941 | 2229 | // Find the merge section into which an input section with index SHNDX in |
c0a62865 DK |
2230 | // OBJECT has been added. Return NULL if none found. |
2231 | ||
2232 | Output_section_data* | |
2233 | Output_section::find_merge_section(const Relobj* object, | |
2ea97941 | 2234 | unsigned int shndx) const |
c0a62865 | 2235 | { |
2ea97941 | 2236 | Input_section_specifier iss(object, shndx); |
c0a62865 DK |
2237 | Output_section_data_by_input_section_map::const_iterator p = |
2238 | this->merge_section_map_.find(iss); | |
2239 | if (p != this->merge_section_map_.end()) | |
2240 | { | |
2241 | Output_section_data* posd = p->second; | |
2ea97941 | 2242 | gold_assert(posd->is_merge_section_for(object, shndx)); |
c0a62865 DK |
2243 | return posd; |
2244 | } | |
2245 | else | |
2246 | return NULL; | |
2247 | } | |
2248 | ||
2249 | // Find an relaxed input section corresponding to an input section | |
2ea97941 | 2250 | // in OBJECT with index SHNDX. |
c0a62865 | 2251 | |
d6344fb5 | 2252 | const Output_relaxed_input_section* |
c0a62865 | 2253 | Output_section::find_relaxed_input_section(const Relobj* object, |
2ea97941 | 2254 | unsigned int shndx) const |
c0a62865 DK |
2255 | { |
2256 | // Be careful that the map may not be valid due to input section export | |
2257 | // to scripts or a check-point restore. | |
2258 | if (!this->is_relaxed_input_section_map_valid_) | |
2259 | { | |
2260 | // Rebuild the map as needed. | |
2261 | this->relaxed_input_section_map_.clear(); | |
2262 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
2263 | p != this->input_sections_.end(); | |
2264 | ++p) | |
2265 | if (p->is_relaxed_input_section()) | |
2266 | { | |
2267 | Input_section_specifier iss(p->relobj(), p->shndx()); | |
2268 | this->relaxed_input_section_map_[iss] = | |
2269 | p->relaxed_input_section(); | |
2270 | } | |
2271 | this->is_relaxed_input_section_map_valid_ = true; | |
2272 | } | |
2273 | ||
2ea97941 | 2274 | Input_section_specifier iss(object, shndx); |
d6344fb5 | 2275 | Output_relaxed_input_section_by_input_section_map::const_iterator p = |
c0a62865 DK |
2276 | this->relaxed_input_section_map_.find(iss); |
2277 | if (p != this->relaxed_input_section_map_.end()) | |
2278 | return p->second; | |
2279 | else | |
2280 | return NULL; | |
2281 | } | |
2282 | ||
2ea97941 ILT |
2283 | // Given an address OFFSET relative to the start of input section |
2284 | // SHNDX in OBJECT, return whether this address is being included in | |
2285 | // the final link. This should only be called if SHNDX in OBJECT has | |
730cdc88 ILT |
2286 | // a special mapping. |
2287 | ||
2288 | bool | |
2289 | Output_section::is_input_address_mapped(const Relobj* object, | |
2ea97941 ILT |
2290 | unsigned int shndx, |
2291 | off_t offset) const | |
730cdc88 | 2292 | { |
c0a62865 | 2293 | // Look at the Output_section_data_maps first. |
2ea97941 | 2294 | const Output_section_data* posd = this->find_merge_section(object, shndx); |
c0a62865 | 2295 | if (posd == NULL) |
2ea97941 | 2296 | posd = this->find_relaxed_input_section(object, shndx); |
c0a62865 DK |
2297 | |
2298 | if (posd != NULL) | |
2299 | { | |
2ea97941 ILT |
2300 | section_offset_type output_offset; |
2301 | bool found = posd->output_offset(object, shndx, offset, &output_offset); | |
c0a62865 | 2302 | gold_assert(found); |
2ea97941 | 2303 | return output_offset != -1; |
c0a62865 DK |
2304 | } |
2305 | ||
2306 | // Fall back to the slow look-up. | |
730cdc88 ILT |
2307 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); |
2308 | p != this->input_sections_.end(); | |
2309 | ++p) | |
2310 | { | |
2ea97941 ILT |
2311 | section_offset_type output_offset; |
2312 | if (p->output_offset(object, shndx, offset, &output_offset)) | |
2313 | return output_offset != -1; | |
730cdc88 ILT |
2314 | } |
2315 | ||
2316 | // By default we assume that the address is mapped. This should | |
2317 | // only be called after we have passed all sections to Layout. At | |
2318 | // that point we should know what we are discarding. | |
2319 | return true; | |
2320 | } | |
2321 | ||
2ea97941 ILT |
2322 | // Given an address OFFSET relative to the start of input section |
2323 | // SHNDX in object OBJECT, return the output offset relative to the | |
1e983657 | 2324 | // start of the input section in the output section. This should only |
2ea97941 | 2325 | // be called if SHNDX in OBJECT has a special mapping. |
730cdc88 | 2326 | |
8383303e | 2327 | section_offset_type |
2ea97941 ILT |
2328 | Output_section::output_offset(const Relobj* object, unsigned int shndx, |
2329 | section_offset_type offset) const | |
730cdc88 | 2330 | { |
c0a62865 DK |
2331 | // This can only be called meaningfully when we know the data size |
2332 | // of this. | |
2333 | gold_assert(this->is_data_size_valid()); | |
730cdc88 | 2334 | |
c0a62865 | 2335 | // Look at the Output_section_data_maps first. |
2ea97941 | 2336 | const Output_section_data* posd = this->find_merge_section(object, shndx); |
c0a62865 | 2337 | if (posd == NULL) |
2ea97941 | 2338 | posd = this->find_relaxed_input_section(object, shndx); |
c0a62865 DK |
2339 | if (posd != NULL) |
2340 | { | |
2ea97941 ILT |
2341 | section_offset_type output_offset; |
2342 | bool found = posd->output_offset(object, shndx, offset, &output_offset); | |
c0a62865 | 2343 | gold_assert(found); |
2ea97941 | 2344 | return output_offset; |
c0a62865 DK |
2345 | } |
2346 | ||
2347 | // Fall back to the slow look-up. | |
730cdc88 ILT |
2348 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); |
2349 | p != this->input_sections_.end(); | |
2350 | ++p) | |
2351 | { | |
2ea97941 ILT |
2352 | section_offset_type output_offset; |
2353 | if (p->output_offset(object, shndx, offset, &output_offset)) | |
2354 | return output_offset; | |
730cdc88 ILT |
2355 | } |
2356 | gold_unreachable(); | |
2357 | } | |
2358 | ||
2ea97941 ILT |
2359 | // Return the output virtual address of OFFSET relative to the start |
2360 | // of input section SHNDX in object OBJECT. | |
b8e6aad9 ILT |
2361 | |
2362 | uint64_t | |
2ea97941 ILT |
2363 | Output_section::output_address(const Relobj* object, unsigned int shndx, |
2364 | off_t offset) const | |
b8e6aad9 ILT |
2365 | { |
2366 | uint64_t addr = this->address() + this->first_input_offset_; | |
c0a62865 DK |
2367 | |
2368 | // Look at the Output_section_data_maps first. | |
2ea97941 | 2369 | const Output_section_data* posd = this->find_merge_section(object, shndx); |
c0a62865 | 2370 | if (posd == NULL) |
2ea97941 | 2371 | posd = this->find_relaxed_input_section(object, shndx); |
c0a62865 DK |
2372 | if (posd != NULL && posd->is_address_valid()) |
2373 | { | |
2ea97941 ILT |
2374 | section_offset_type output_offset; |
2375 | bool found = posd->output_offset(object, shndx, offset, &output_offset); | |
c0a62865 | 2376 | gold_assert(found); |
2ea97941 | 2377 | return posd->address() + output_offset; |
c0a62865 DK |
2378 | } |
2379 | ||
2380 | // Fall back to the slow look-up. | |
b8e6aad9 ILT |
2381 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); |
2382 | p != this->input_sections_.end(); | |
2383 | ++p) | |
2384 | { | |
2385 | addr = align_address(addr, p->addralign()); | |
2ea97941 ILT |
2386 | section_offset_type output_offset; |
2387 | if (p->output_offset(object, shndx, offset, &output_offset)) | |
730cdc88 | 2388 | { |
2ea97941 | 2389 | if (output_offset == -1) |
eff45813 | 2390 | return -1ULL; |
2ea97941 | 2391 | return addr + output_offset; |
730cdc88 | 2392 | } |
b8e6aad9 ILT |
2393 | addr += p->data_size(); |
2394 | } | |
2395 | ||
2396 | // If we get here, it means that we don't know the mapping for this | |
2397 | // input section. This might happen in principle if | |
2398 | // add_input_section were called before add_output_section_data. | |
2399 | // But it should never actually happen. | |
2400 | ||
2401 | gold_unreachable(); | |
ead1e424 ILT |
2402 | } |
2403 | ||
e29e076a | 2404 | // Find the output address of the start of the merged section for |
2ea97941 | 2405 | // input section SHNDX in object OBJECT. |
a9a60db6 | 2406 | |
e29e076a ILT |
2407 | bool |
2408 | Output_section::find_starting_output_address(const Relobj* object, | |
2ea97941 | 2409 | unsigned int shndx, |
e29e076a | 2410 | uint64_t* paddr) const |
a9a60db6 | 2411 | { |
c0a62865 DK |
2412 | // FIXME: This becomes a bottle-neck if we have many relaxed sections. |
2413 | // Looking up the merge section map does not always work as we sometimes | |
2414 | // find a merge section without its address set. | |
a9a60db6 ILT |
2415 | uint64_t addr = this->address() + this->first_input_offset_; |
2416 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
2417 | p != this->input_sections_.end(); | |
2418 | ++p) | |
2419 | { | |
2420 | addr = align_address(addr, p->addralign()); | |
2421 | ||
2422 | // It would be nice if we could use the existing output_offset | |
2423 | // method to get the output offset of input offset 0. | |
2424 | // Unfortunately we don't know for sure that input offset 0 is | |
2425 | // mapped at all. | |
2ea97941 | 2426 | if (p->is_merge_section_for(object, shndx)) |
e29e076a ILT |
2427 | { |
2428 | *paddr = addr; | |
2429 | return true; | |
2430 | } | |
a9a60db6 ILT |
2431 | |
2432 | addr += p->data_size(); | |
2433 | } | |
e29e076a ILT |
2434 | |
2435 | // We couldn't find a merge output section for this input section. | |
2436 | return false; | |
a9a60db6 ILT |
2437 | } |
2438 | ||
27bc2bce | 2439 | // Set the data size of an Output_section. This is where we handle |
ead1e424 ILT |
2440 | // setting the addresses of any Output_section_data objects. |
2441 | ||
2442 | void | |
27bc2bce | 2443 | Output_section::set_final_data_size() |
ead1e424 ILT |
2444 | { |
2445 | if (this->input_sections_.empty()) | |
27bc2bce ILT |
2446 | { |
2447 | this->set_data_size(this->current_data_size_for_child()); | |
2448 | return; | |
2449 | } | |
ead1e424 | 2450 | |
2fd32231 ILT |
2451 | if (this->must_sort_attached_input_sections()) |
2452 | this->sort_attached_input_sections(); | |
2453 | ||
2ea97941 | 2454 | uint64_t address = this->address(); |
27bc2bce | 2455 | off_t startoff = this->offset(); |
ead1e424 ILT |
2456 | off_t off = startoff + this->first_input_offset_; |
2457 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2458 | p != this->input_sections_.end(); | |
2459 | ++p) | |
2460 | { | |
2461 | off = align_address(off, p->addralign()); | |
2ea97941 | 2462 | p->set_address_and_file_offset(address + (off - startoff), off, |
96803768 | 2463 | startoff); |
ead1e424 ILT |
2464 | off += p->data_size(); |
2465 | } | |
2466 | ||
2467 | this->set_data_size(off - startoff); | |
2468 | } | |
9a0910c3 | 2469 | |
a445fddf ILT |
2470 | // Reset the address and file offset. |
2471 | ||
2472 | void | |
2473 | Output_section::do_reset_address_and_file_offset() | |
2474 | { | |
20e6d0d6 DK |
2475 | // An unallocated section has no address. Forcing this means that |
2476 | // we don't need special treatment for symbols defined in debug | |
2477 | // sections. We do the same in the constructor. | |
2478 | if ((this->flags_ & elfcpp::SHF_ALLOC) == 0) | |
2479 | this->set_address(0); | |
2480 | ||
a445fddf ILT |
2481 | for (Input_section_list::iterator p = this->input_sections_.begin(); |
2482 | p != this->input_sections_.end(); | |
2483 | ++p) | |
2484 | p->reset_address_and_file_offset(); | |
2485 | } | |
20e6d0d6 DK |
2486 | |
2487 | // Return true if address and file offset have the values after reset. | |
2488 | ||
2489 | bool | |
2490 | Output_section::do_address_and_file_offset_have_reset_values() const | |
2491 | { | |
2492 | if (this->is_offset_valid()) | |
2493 | return false; | |
2494 | ||
2495 | // An unallocated section has address 0 after its construction or a reset. | |
2496 | if ((this->flags_ & elfcpp::SHF_ALLOC) == 0) | |
2497 | return this->is_address_valid() && this->address() == 0; | |
2498 | else | |
2499 | return !this->is_address_valid(); | |
2500 | } | |
a445fddf | 2501 | |
7bf1f802 ILT |
2502 | // Set the TLS offset. Called only for SHT_TLS sections. |
2503 | ||
2504 | void | |
2505 | Output_section::do_set_tls_offset(uint64_t tls_base) | |
2506 | { | |
2507 | this->tls_offset_ = this->address() - tls_base; | |
2508 | } | |
2509 | ||
2fd32231 ILT |
2510 | // In a few cases we need to sort the input sections attached to an |
2511 | // output section. This is used to implement the type of constructor | |
2512 | // priority ordering implemented by the GNU linker, in which the | |
2513 | // priority becomes part of the section name and the sections are | |
2514 | // sorted by name. We only do this for an output section if we see an | |
2515 | // attached input section matching ".ctor.*", ".dtor.*", | |
2516 | // ".init_array.*" or ".fini_array.*". | |
2517 | ||
2518 | class Output_section::Input_section_sort_entry | |
2519 | { | |
2520 | public: | |
2521 | Input_section_sort_entry() | |
2522 | : input_section_(), index_(-1U), section_has_name_(false), | |
2523 | section_name_() | |
2524 | { } | |
2525 | ||
2ea97941 ILT |
2526 | Input_section_sort_entry(const Input_section& input_section, |
2527 | unsigned int index) | |
2528 | : input_section_(input_section), index_(index), | |
2529 | section_has_name_(input_section.is_input_section() | |
2530 | || input_section.is_relaxed_input_section()) | |
2fd32231 ILT |
2531 | { |
2532 | if (this->section_has_name_) | |
2533 | { | |
2534 | // This is only called single-threaded from Layout::finalize, | |
2535 | // so it is OK to lock. Unfortunately we have no way to pass | |
2536 | // in a Task token. | |
2537 | const Task* dummy_task = reinterpret_cast<const Task*>(-1); | |
2ea97941 ILT |
2538 | Object* obj = (input_section.is_input_section() |
2539 | ? input_section.relobj() | |
2540 | : input_section.relaxed_input_section()->relobj()); | |
2fd32231 ILT |
2541 | Task_lock_obj<Object> tl(dummy_task, obj); |
2542 | ||
2543 | // This is a slow operation, which should be cached in | |
2544 | // Layout::layout if this becomes a speed problem. | |
2ea97941 | 2545 | this->section_name_ = obj->section_name(input_section.shndx()); |
2fd32231 ILT |
2546 | } |
2547 | } | |
2548 | ||
2549 | // Return the Input_section. | |
2550 | const Input_section& | |
2551 | input_section() const | |
2552 | { | |
2553 | gold_assert(this->index_ != -1U); | |
2554 | return this->input_section_; | |
2555 | } | |
2556 | ||
2557 | // The index of this entry in the original list. This is used to | |
2558 | // make the sort stable. | |
2559 | unsigned int | |
2560 | index() const | |
2561 | { | |
2562 | gold_assert(this->index_ != -1U); | |
2563 | return this->index_; | |
2564 | } | |
2565 | ||
2566 | // Whether there is a section name. | |
2567 | bool | |
2568 | section_has_name() const | |
2569 | { return this->section_has_name_; } | |
2570 | ||
2571 | // The section name. | |
2572 | const std::string& | |
2573 | section_name() const | |
2574 | { | |
2575 | gold_assert(this->section_has_name_); | |
2576 | return this->section_name_; | |
2577 | } | |
2578 | ||
ab794b6b ILT |
2579 | // Return true if the section name has a priority. This is assumed |
2580 | // to be true if it has a dot after the initial dot. | |
2fd32231 | 2581 | bool |
ab794b6b | 2582 | has_priority() const |
2fd32231 ILT |
2583 | { |
2584 | gold_assert(this->section_has_name_); | |
ab794b6b | 2585 | return this->section_name_.find('.', 1); |
2fd32231 ILT |
2586 | } |
2587 | ||
ab794b6b ILT |
2588 | // Return true if this an input file whose base name matches |
2589 | // FILE_NAME. The base name must have an extension of ".o", and | |
2590 | // must be exactly FILE_NAME.o or FILE_NAME, one character, ".o". | |
2591 | // This is to match crtbegin.o as well as crtbeginS.o without | |
2592 | // getting confused by other possibilities. Overall matching the | |
2593 | // file name this way is a dreadful hack, but the GNU linker does it | |
2594 | // in order to better support gcc, and we need to be compatible. | |
2fd32231 | 2595 | bool |
2ea97941 | 2596 | match_file_name(const char* match_file_name) const |
2fd32231 | 2597 | { |
2fd32231 ILT |
2598 | const std::string& file_name(this->input_section_.relobj()->name()); |
2599 | const char* base_name = lbasename(file_name.c_str()); | |
2ea97941 ILT |
2600 | size_t match_len = strlen(match_file_name); |
2601 | if (strncmp(base_name, match_file_name, match_len) != 0) | |
2fd32231 ILT |
2602 | return false; |
2603 | size_t base_len = strlen(base_name); | |
2604 | if (base_len != match_len + 2 && base_len != match_len + 3) | |
2605 | return false; | |
2606 | return memcmp(base_name + base_len - 2, ".o", 2) == 0; | |
2607 | } | |
2608 | ||
2609 | private: | |
2610 | // The Input_section we are sorting. | |
2611 | Input_section input_section_; | |
2612 | // The index of this Input_section in the original list. | |
2613 | unsigned int index_; | |
2614 | // Whether this Input_section has a section name--it won't if this | |
2615 | // is some random Output_section_data. | |
2616 | bool section_has_name_; | |
2617 | // The section name if there is one. | |
2618 | std::string section_name_; | |
2619 | }; | |
2620 | ||
2621 | // Return true if S1 should come before S2 in the output section. | |
2622 | ||
2623 | bool | |
2624 | Output_section::Input_section_sort_compare::operator()( | |
2625 | const Output_section::Input_section_sort_entry& s1, | |
2626 | const Output_section::Input_section_sort_entry& s2) const | |
2627 | { | |
ab794b6b ILT |
2628 | // crtbegin.o must come first. |
2629 | bool s1_begin = s1.match_file_name("crtbegin"); | |
2630 | bool s2_begin = s2.match_file_name("crtbegin"); | |
2fd32231 ILT |
2631 | if (s1_begin || s2_begin) |
2632 | { | |
2633 | if (!s1_begin) | |
2634 | return false; | |
2635 | if (!s2_begin) | |
2636 | return true; | |
2637 | return s1.index() < s2.index(); | |
2638 | } | |
2639 | ||
ab794b6b ILT |
2640 | // crtend.o must come last. |
2641 | bool s1_end = s1.match_file_name("crtend"); | |
2642 | bool s2_end = s2.match_file_name("crtend"); | |
2fd32231 ILT |
2643 | if (s1_end || s2_end) |
2644 | { | |
2645 | if (!s1_end) | |
2646 | return true; | |
2647 | if (!s2_end) | |
2648 | return false; | |
2649 | return s1.index() < s2.index(); | |
2650 | } | |
2651 | ||
ab794b6b ILT |
2652 | // We sort all the sections with no names to the end. |
2653 | if (!s1.section_has_name() || !s2.section_has_name()) | |
2654 | { | |
2655 | if (s1.section_has_name()) | |
2656 | return true; | |
2657 | if (s2.section_has_name()) | |
2658 | return false; | |
2659 | return s1.index() < s2.index(); | |
2660 | } | |
2fd32231 | 2661 | |
ab794b6b ILT |
2662 | // A section with a priority follows a section without a priority. |
2663 | // The GNU linker does this for all but .init_array sections; until | |
2664 | // further notice we'll assume that that is an mistake. | |
2665 | bool s1_has_priority = s1.has_priority(); | |
2666 | bool s2_has_priority = s2.has_priority(); | |
2667 | if (s1_has_priority && !s2_has_priority) | |
2fd32231 | 2668 | return false; |
ab794b6b | 2669 | if (!s1_has_priority && s2_has_priority) |
2fd32231 ILT |
2670 | return true; |
2671 | ||
2672 | // Otherwise we sort by name. | |
2673 | int compare = s1.section_name().compare(s2.section_name()); | |
2674 | if (compare != 0) | |
2675 | return compare < 0; | |
2676 | ||
2677 | // Otherwise we keep the input order. | |
2678 | return s1.index() < s2.index(); | |
2679 | } | |
2680 | ||
2681 | // Sort the input sections attached to an output section. | |
2682 | ||
2683 | void | |
2684 | Output_section::sort_attached_input_sections() | |
2685 | { | |
2686 | if (this->attached_input_sections_are_sorted_) | |
2687 | return; | |
2688 | ||
20e6d0d6 DK |
2689 | if (this->checkpoint_ != NULL |
2690 | && !this->checkpoint_->input_sections_saved()) | |
2691 | this->checkpoint_->save_input_sections(); | |
2692 | ||
2fd32231 ILT |
2693 | // The only thing we know about an input section is the object and |
2694 | // the section index. We need the section name. Recomputing this | |
2695 | // is slow but this is an unusual case. If this becomes a speed | |
2696 | // problem we can cache the names as required in Layout::layout. | |
2697 | ||
2698 | // We start by building a larger vector holding a copy of each | |
2699 | // Input_section, plus its current index in the list and its name. | |
2700 | std::vector<Input_section_sort_entry> sort_list; | |
2701 | ||
2702 | unsigned int i = 0; | |
2703 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2704 | p != this->input_sections_.end(); | |
2705 | ++p, ++i) | |
2706 | sort_list.push_back(Input_section_sort_entry(*p, i)); | |
2707 | ||
2708 | // Sort the input sections. | |
2709 | std::sort(sort_list.begin(), sort_list.end(), Input_section_sort_compare()); | |
2710 | ||
2711 | // Copy the sorted input sections back to our list. | |
2712 | this->input_sections_.clear(); | |
2713 | for (std::vector<Input_section_sort_entry>::iterator p = sort_list.begin(); | |
2714 | p != sort_list.end(); | |
2715 | ++p) | |
2716 | this->input_sections_.push_back(p->input_section()); | |
2717 | ||
2718 | // Remember that we sorted the input sections, since we might get | |
2719 | // called again. | |
2720 | this->attached_input_sections_are_sorted_ = true; | |
2721 | } | |
2722 | ||
61ba1cf9 ILT |
2723 | // Write the section header to *OSHDR. |
2724 | ||
2725 | template<int size, bool big_endian> | |
2726 | void | |
16649710 ILT |
2727 | Output_section::write_header(const Layout* layout, |
2728 | const Stringpool* secnamepool, | |
61ba1cf9 ILT |
2729 | elfcpp::Shdr_write<size, big_endian>* oshdr) const |
2730 | { | |
2731 | oshdr->put_sh_name(secnamepool->get_offset(this->name_)); | |
2732 | oshdr->put_sh_type(this->type_); | |
6a74a719 | 2733 | |
2ea97941 | 2734 | elfcpp::Elf_Xword flags = this->flags_; |
755ab8af | 2735 | if (this->info_section_ != NULL && this->info_uses_section_index_) |
2ea97941 ILT |
2736 | flags |= elfcpp::SHF_INFO_LINK; |
2737 | oshdr->put_sh_flags(flags); | |
6a74a719 | 2738 | |
61ba1cf9 ILT |
2739 | oshdr->put_sh_addr(this->address()); |
2740 | oshdr->put_sh_offset(this->offset()); | |
2741 | oshdr->put_sh_size(this->data_size()); | |
16649710 ILT |
2742 | if (this->link_section_ != NULL) |
2743 | oshdr->put_sh_link(this->link_section_->out_shndx()); | |
2744 | else if (this->should_link_to_symtab_) | |
2745 | oshdr->put_sh_link(layout->symtab_section()->out_shndx()); | |
2746 | else if (this->should_link_to_dynsym_) | |
2747 | oshdr->put_sh_link(layout->dynsym_section()->out_shndx()); | |
2748 | else | |
2749 | oshdr->put_sh_link(this->link_); | |
755ab8af | 2750 | |
2ea97941 | 2751 | elfcpp::Elf_Word info; |
16649710 | 2752 | if (this->info_section_ != NULL) |
755ab8af ILT |
2753 | { |
2754 | if (this->info_uses_section_index_) | |
2ea97941 | 2755 | info = this->info_section_->out_shndx(); |
755ab8af | 2756 | else |
2ea97941 | 2757 | info = this->info_section_->symtab_index(); |
755ab8af | 2758 | } |
6a74a719 | 2759 | else if (this->info_symndx_ != NULL) |
2ea97941 | 2760 | info = this->info_symndx_->symtab_index(); |
16649710 | 2761 | else |
2ea97941 ILT |
2762 | info = this->info_; |
2763 | oshdr->put_sh_info(info); | |
755ab8af | 2764 | |
61ba1cf9 ILT |
2765 | oshdr->put_sh_addralign(this->addralign_); |
2766 | oshdr->put_sh_entsize(this->entsize_); | |
a2fb1b05 ILT |
2767 | } |
2768 | ||
ead1e424 ILT |
2769 | // Write out the data. For input sections the data is written out by |
2770 | // Object::relocate, but we have to handle Output_section_data objects | |
2771 | // here. | |
2772 | ||
2773 | void | |
2774 | Output_section::do_write(Output_file* of) | |
2775 | { | |
96803768 ILT |
2776 | gold_assert(!this->requires_postprocessing()); |
2777 | ||
c0a62865 DK |
2778 | // If the target performs relaxation, we delay filler generation until now. |
2779 | gold_assert(!this->generate_code_fills_at_write_ || this->fills_.empty()); | |
2780 | ||
c51e6221 ILT |
2781 | off_t output_section_file_offset = this->offset(); |
2782 | for (Fill_list::iterator p = this->fills_.begin(); | |
2783 | p != this->fills_.end(); | |
2784 | ++p) | |
2785 | { | |
8851ecca | 2786 | std::string fill_data(parameters->target().code_fill(p->length())); |
c51e6221 | 2787 | of->write(output_section_file_offset + p->section_offset(), |
a445fddf | 2788 | fill_data.data(), fill_data.size()); |
c51e6221 ILT |
2789 | } |
2790 | ||
c0a62865 | 2791 | off_t off = this->offset() + this->first_input_offset_; |
ead1e424 ILT |
2792 | for (Input_section_list::iterator p = this->input_sections_.begin(); |
2793 | p != this->input_sections_.end(); | |
2794 | ++p) | |
c0a62865 DK |
2795 | { |
2796 | off_t aligned_off = align_address(off, p->addralign()); | |
2797 | if (this->generate_code_fills_at_write_ && (off != aligned_off)) | |
2798 | { | |
2799 | size_t fill_len = aligned_off - off; | |
2800 | std::string fill_data(parameters->target().code_fill(fill_len)); | |
2801 | of->write(off, fill_data.data(), fill_data.size()); | |
2802 | } | |
2803 | ||
2804 | p->write(of); | |
2805 | off = aligned_off + p->data_size(); | |
2806 | } | |
ead1e424 ILT |
2807 | } |
2808 | ||
96803768 ILT |
2809 | // If a section requires postprocessing, create the buffer to use. |
2810 | ||
2811 | void | |
2812 | Output_section::create_postprocessing_buffer() | |
2813 | { | |
2814 | gold_assert(this->requires_postprocessing()); | |
1bedcac5 ILT |
2815 | |
2816 | if (this->postprocessing_buffer_ != NULL) | |
2817 | return; | |
96803768 ILT |
2818 | |
2819 | if (!this->input_sections_.empty()) | |
2820 | { | |
2821 | off_t off = this->first_input_offset_; | |
2822 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2823 | p != this->input_sections_.end(); | |
2824 | ++p) | |
2825 | { | |
2826 | off = align_address(off, p->addralign()); | |
2827 | p->finalize_data_size(); | |
2828 | off += p->data_size(); | |
2829 | } | |
2830 | this->set_current_data_size_for_child(off); | |
2831 | } | |
2832 | ||
2833 | off_t buffer_size = this->current_data_size_for_child(); | |
2834 | this->postprocessing_buffer_ = new unsigned char[buffer_size]; | |
2835 | } | |
2836 | ||
2837 | // Write all the data of an Output_section into the postprocessing | |
2838 | // buffer. This is used for sections which require postprocessing, | |
2839 | // such as compression. Input sections are handled by | |
2840 | // Object::Relocate. | |
2841 | ||
2842 | void | |
2843 | Output_section::write_to_postprocessing_buffer() | |
2844 | { | |
2845 | gold_assert(this->requires_postprocessing()); | |
2846 | ||
c0a62865 DK |
2847 | // If the target performs relaxation, we delay filler generation until now. |
2848 | gold_assert(!this->generate_code_fills_at_write_ || this->fills_.empty()); | |
2849 | ||
96803768 ILT |
2850 | unsigned char* buffer = this->postprocessing_buffer(); |
2851 | for (Fill_list::iterator p = this->fills_.begin(); | |
2852 | p != this->fills_.end(); | |
2853 | ++p) | |
2854 | { | |
8851ecca | 2855 | std::string fill_data(parameters->target().code_fill(p->length())); |
a445fddf ILT |
2856 | memcpy(buffer + p->section_offset(), fill_data.data(), |
2857 | fill_data.size()); | |
96803768 ILT |
2858 | } |
2859 | ||
2860 | off_t off = this->first_input_offset_; | |
2861 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2862 | p != this->input_sections_.end(); | |
2863 | ++p) | |
2864 | { | |
c0a62865 DK |
2865 | off_t aligned_off = align_address(off, p->addralign()); |
2866 | if (this->generate_code_fills_at_write_ && (off != aligned_off)) | |
2867 | { | |
2868 | size_t fill_len = aligned_off - off; | |
2869 | std::string fill_data(parameters->target().code_fill(fill_len)); | |
2870 | memcpy(buffer + off, fill_data.data(), fill_data.size()); | |
2871 | } | |
2872 | ||
2873 | p->write_to_buffer(buffer + aligned_off); | |
2874 | off = aligned_off + p->data_size(); | |
96803768 ILT |
2875 | } |
2876 | } | |
2877 | ||
a445fddf ILT |
2878 | // Get the input sections for linker script processing. We leave |
2879 | // behind the Output_section_data entries. Note that this may be | |
2880 | // slightly incorrect for merge sections. We will leave them behind, | |
2881 | // but it is possible that the script says that they should follow | |
2882 | // some other input sections, as in: | |
2883 | // .rodata { *(.rodata) *(.rodata.cst*) } | |
2884 | // For that matter, we don't handle this correctly: | |
2885 | // .rodata { foo.o(.rodata.cst*) *(.rodata.cst*) } | |
2886 | // With luck this will never matter. | |
2887 | ||
2888 | uint64_t | |
2889 | Output_section::get_input_sections( | |
2ea97941 | 2890 | uint64_t address, |
a445fddf | 2891 | const std::string& fill, |
2ea97941 | 2892 | std::list<Simple_input_section>* input_sections) |
a445fddf | 2893 | { |
20e6d0d6 DK |
2894 | if (this->checkpoint_ != NULL |
2895 | && !this->checkpoint_->input_sections_saved()) | |
2896 | this->checkpoint_->save_input_sections(); | |
2897 | ||
c0a62865 DK |
2898 | // Invalidate the relaxed input section map. |
2899 | this->is_relaxed_input_section_map_valid_ = false; | |
2900 | ||
2ea97941 | 2901 | uint64_t orig_address = address; |
a445fddf | 2902 | |
2ea97941 | 2903 | address = align_address(address, this->addralign()); |
a445fddf ILT |
2904 | |
2905 | Input_section_list remaining; | |
2906 | for (Input_section_list::iterator p = this->input_sections_.begin(); | |
2907 | p != this->input_sections_.end(); | |
2908 | ++p) | |
2909 | { | |
2910 | if (p->is_input_section()) | |
2ea97941 | 2911 | input_sections->push_back(Simple_input_section(p->relobj(), |
20e6d0d6 DK |
2912 | p->shndx())); |
2913 | else if (p->is_relaxed_input_section()) | |
2ea97941 | 2914 | input_sections->push_back( |
20e6d0d6 | 2915 | Simple_input_section(p->relaxed_input_section())); |
a445fddf ILT |
2916 | else |
2917 | { | |
2ea97941 ILT |
2918 | uint64_t aligned_address = align_address(address, p->addralign()); |
2919 | if (aligned_address != address && !fill.empty()) | |
a445fddf ILT |
2920 | { |
2921 | section_size_type length = | |
2ea97941 | 2922 | convert_to_section_size_type(aligned_address - address); |
a445fddf ILT |
2923 | std::string this_fill; |
2924 | this_fill.reserve(length); | |
2925 | while (this_fill.length() + fill.length() <= length) | |
2926 | this_fill += fill; | |
2927 | if (this_fill.length() < length) | |
2928 | this_fill.append(fill, 0, length - this_fill.length()); | |
2929 | ||
2930 | Output_section_data* posd = new Output_data_const(this_fill, 0); | |
2931 | remaining.push_back(Input_section(posd)); | |
2932 | } | |
2ea97941 | 2933 | address = aligned_address; |
a445fddf ILT |
2934 | |
2935 | remaining.push_back(*p); | |
2936 | ||
2937 | p->finalize_data_size(); | |
2ea97941 | 2938 | address += p->data_size(); |
a445fddf ILT |
2939 | } |
2940 | } | |
2941 | ||
2942 | this->input_sections_.swap(remaining); | |
2943 | this->first_input_offset_ = 0; | |
2944 | ||
2ea97941 ILT |
2945 | uint64_t data_size = address - orig_address; |
2946 | this->set_current_data_size_for_child(data_size); | |
2947 | return data_size; | |
a445fddf ILT |
2948 | } |
2949 | ||
2950 | // Add an input section from a script. | |
2951 | ||
2952 | void | |
20e6d0d6 | 2953 | Output_section::add_input_section_for_script(const Simple_input_section& sis, |
2ea97941 ILT |
2954 | off_t data_size, |
2955 | uint64_t addralign) | |
a445fddf | 2956 | { |
2ea97941 ILT |
2957 | if (addralign > this->addralign_) |
2958 | this->addralign_ = addralign; | |
a445fddf ILT |
2959 | |
2960 | off_t offset_in_section = this->current_data_size_for_child(); | |
2961 | off_t aligned_offset_in_section = align_address(offset_in_section, | |
2ea97941 | 2962 | addralign); |
a445fddf ILT |
2963 | |
2964 | this->set_current_data_size_for_child(aligned_offset_in_section | |
2ea97941 | 2965 | + data_size); |
a445fddf | 2966 | |
20e6d0d6 DK |
2967 | Input_section is = |
2968 | (sis.is_relaxed_input_section() | |
2969 | ? Input_section(sis.relaxed_input_section()) | |
2ea97941 | 2970 | : Input_section(sis.relobj(), sis.shndx(), data_size, addralign)); |
20e6d0d6 DK |
2971 | this->input_sections_.push_back(is); |
2972 | } | |
2973 | ||
2974 | // | |
2975 | ||
2976 | void | |
2977 | Output_section::save_states() | |
2978 | { | |
2979 | gold_assert(this->checkpoint_ == NULL); | |
2980 | Checkpoint_output_section* checkpoint = | |
2981 | new Checkpoint_output_section(this->addralign_, this->flags_, | |
2982 | this->input_sections_, | |
2983 | this->first_input_offset_, | |
2984 | this->attached_input_sections_are_sorted_); | |
2985 | this->checkpoint_ = checkpoint; | |
2986 | gold_assert(this->fills_.empty()); | |
2987 | } | |
2988 | ||
2989 | void | |
2990 | Output_section::restore_states() | |
2991 | { | |
2992 | gold_assert(this->checkpoint_ != NULL); | |
2993 | Checkpoint_output_section* checkpoint = this->checkpoint_; | |
2994 | ||
2995 | this->addralign_ = checkpoint->addralign(); | |
2996 | this->flags_ = checkpoint->flags(); | |
2997 | this->first_input_offset_ = checkpoint->first_input_offset(); | |
2998 | ||
2999 | if (!checkpoint->input_sections_saved()) | |
3000 | { | |
3001 | // If we have not copied the input sections, just resize it. | |
3002 | size_t old_size = checkpoint->input_sections_size(); | |
3003 | gold_assert(this->input_sections_.size() >= old_size); | |
3004 | this->input_sections_.resize(old_size); | |
3005 | } | |
3006 | else | |
3007 | { | |
3008 | // We need to copy the whole list. This is not efficient for | |
3009 | // extremely large output with hundreads of thousands of input | |
3010 | // objects. We may need to re-think how we should pass sections | |
3011 | // to scripts. | |
c0a62865 | 3012 | this->input_sections_ = *checkpoint->input_sections(); |
20e6d0d6 DK |
3013 | } |
3014 | ||
3015 | this->attached_input_sections_are_sorted_ = | |
3016 | checkpoint->attached_input_sections_are_sorted(); | |
c0a62865 DK |
3017 | |
3018 | // Simply invalidate the relaxed input section map since we do not keep | |
3019 | // track of it. | |
3020 | this->is_relaxed_input_section_map_valid_ = false; | |
a445fddf ILT |
3021 | } |
3022 | ||
7d9e3d98 ILT |
3023 | // Print to the map file. |
3024 | ||
3025 | void | |
3026 | Output_section::do_print_to_mapfile(Mapfile* mapfile) const | |
3027 | { | |
3028 | mapfile->print_output_section(this); | |
3029 | ||
3030 | for (Input_section_list::const_iterator p = this->input_sections_.begin(); | |
3031 | p != this->input_sections_.end(); | |
3032 | ++p) | |
3033 | p->print_to_mapfile(mapfile); | |
3034 | } | |
3035 | ||
38c5e8b4 ILT |
3036 | // Print stats for merge sections to stderr. |
3037 | ||
3038 | void | |
3039 | Output_section::print_merge_stats() | |
3040 | { | |
3041 | Input_section_list::iterator p; | |
3042 | for (p = this->input_sections_.begin(); | |
3043 | p != this->input_sections_.end(); | |
3044 | ++p) | |
3045 | p->print_merge_stats(this->name_); | |
3046 | } | |
3047 | ||
a2fb1b05 ILT |
3048 | // Output segment methods. |
3049 | ||
2ea97941 | 3050 | Output_segment::Output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags) |
54dc6425 | 3051 | : output_data_(), |
75f65a3e | 3052 | output_bss_(), |
a2fb1b05 ILT |
3053 | vaddr_(0), |
3054 | paddr_(0), | |
3055 | memsz_(0), | |
a445fddf ILT |
3056 | max_align_(0), |
3057 | min_p_align_(0), | |
a2fb1b05 ILT |
3058 | offset_(0), |
3059 | filesz_(0), | |
2ea97941 ILT |
3060 | type_(type), |
3061 | flags_(flags), | |
a445fddf | 3062 | is_max_align_known_(false), |
8a5e3e08 ILT |
3063 | are_addresses_set_(false), |
3064 | is_large_data_segment_(false) | |
a2fb1b05 | 3065 | { |
bb321bb1 ILT |
3066 | // The ELF ABI specifies that a PT_TLS segment always has PF_R as |
3067 | // the flags. | |
3068 | if (type == elfcpp::PT_TLS) | |
3069 | this->flags_ = elfcpp::PF_R; | |
a2fb1b05 ILT |
3070 | } |
3071 | ||
3072 | // Add an Output_section to an Output_segment. | |
3073 | ||
3074 | void | |
75f65a3e | 3075 | Output_segment::add_output_section(Output_section* os, |
f5c870d2 ILT |
3076 | elfcpp::Elf_Word seg_flags, |
3077 | bool do_sort) | |
a2fb1b05 | 3078 | { |
a3ad94ed | 3079 | gold_assert((os->flags() & elfcpp::SHF_ALLOC) != 0); |
a445fddf | 3080 | gold_assert(!this->is_max_align_known_); |
8a5e3e08 | 3081 | gold_assert(os->is_large_data_section() == this->is_large_data_segment()); |
96a0d71b | 3082 | gold_assert(this->type() == elfcpp::PT_LOAD || !do_sort); |
75f65a3e | 3083 | |
a192ba05 | 3084 | this->update_flags_for_output_section(seg_flags); |
75f65a3e ILT |
3085 | |
3086 | Output_segment::Output_data_list* pdl; | |
3087 | if (os->type() == elfcpp::SHT_NOBITS) | |
3088 | pdl = &this->output_bss_; | |
3089 | else | |
3090 | pdl = &this->output_data_; | |
54dc6425 | 3091 | |
f5c870d2 ILT |
3092 | // Note that while there may be many input sections in an output |
3093 | // section, there are normally only a few output sections in an | |
3094 | // output segment. The loops below are expected to be fast. | |
3095 | ||
a2fb1b05 | 3096 | // So that PT_NOTE segments will work correctly, we need to ensure |
96a0d71b | 3097 | // that all SHT_NOTE sections are adjacent. |
61ba1cf9 | 3098 | if (os->type() == elfcpp::SHT_NOTE && !pdl->empty()) |
a2fb1b05 | 3099 | { |
a3ad94ed | 3100 | Output_segment::Output_data_list::iterator p = pdl->end(); |
75f65a3e | 3101 | do |
54dc6425 | 3102 | { |
75f65a3e | 3103 | --p; |
54dc6425 ILT |
3104 | if ((*p)->is_section_type(elfcpp::SHT_NOTE)) |
3105 | { | |
3106 | ++p; | |
75f65a3e | 3107 | pdl->insert(p, os); |
54dc6425 ILT |
3108 | return; |
3109 | } | |
3110 | } | |
75f65a3e | 3111 | while (p != pdl->begin()); |
54dc6425 ILT |
3112 | } |
3113 | ||
3114 | // Similarly, so that PT_TLS segments will work, we need to group | |
75f65a3e ILT |
3115 | // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special |
3116 | // case: we group the SHF_TLS/SHT_NOBITS sections right after the | |
3117 | // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS | |
07f397ab | 3118 | // correctly. SHF_TLS sections get added to both a PT_LOAD segment |
f5c870d2 ILT |
3119 | // and the PT_TLS segment; we do this grouping only for the PT_LOAD |
3120 | // segment. | |
07f397ab | 3121 | if (this->type_ != elfcpp::PT_TLS |
2d924fd9 | 3122 | && (os->flags() & elfcpp::SHF_TLS) != 0) |
54dc6425 | 3123 | { |
75f65a3e | 3124 | pdl = &this->output_data_; |
661be1e2 | 3125 | if (!pdl->empty()) |
a2fb1b05 | 3126 | { |
661be1e2 ILT |
3127 | bool nobits = os->type() == elfcpp::SHT_NOBITS; |
3128 | bool sawtls = false; | |
3129 | Output_segment::Output_data_list::iterator p = pdl->end(); | |
3130 | gold_assert(p != pdl->begin()); | |
3131 | do | |
a2fb1b05 | 3132 | { |
661be1e2 ILT |
3133 | --p; |
3134 | bool insert; | |
3135 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
3136 | { | |
3137 | sawtls = true; | |
3138 | // Put a NOBITS section after the first TLS section. | |
3139 | // Put a PROGBITS section after the first | |
3140 | // TLS/PROGBITS section. | |
3141 | insert = nobits || !(*p)->is_section_type(elfcpp::SHT_NOBITS); | |
3142 | } | |
3143 | else | |
3144 | { | |
3145 | // If we've gone past the TLS sections, but we've | |
3146 | // seen a TLS section, then we need to insert this | |
3147 | // section now. | |
3148 | insert = sawtls; | |
3149 | } | |
3150 | ||
3151 | if (insert) | |
3152 | { | |
3153 | ++p; | |
3154 | pdl->insert(p, os); | |
3155 | return; | |
3156 | } | |
a2fb1b05 | 3157 | } |
661be1e2 | 3158 | while (p != pdl->begin()); |
a2fb1b05 | 3159 | } |
ead1e424 | 3160 | |
dbe717ef ILT |
3161 | // There are no TLS sections yet; put this one at the requested |
3162 | // location in the section list. | |
a2fb1b05 ILT |
3163 | } |
3164 | ||
1a2dff53 | 3165 | if (do_sort) |
9f1d377b | 3166 | { |
1a2dff53 ILT |
3167 | // For the PT_GNU_RELRO segment, we need to group relro |
3168 | // sections, and we need to put them before any non-relro | |
3169 | // sections. Any relro local sections go before relro non-local | |
3170 | // sections. One section may be marked as the last relro | |
3171 | // section. | |
3172 | if (os->is_relro()) | |
9f1d377b | 3173 | { |
1a2dff53 ILT |
3174 | gold_assert(pdl == &this->output_data_); |
3175 | Output_segment::Output_data_list::iterator p; | |
3176 | for (p = pdl->begin(); p != pdl->end(); ++p) | |
3177 | { | |
3178 | if (!(*p)->is_section()) | |
3179 | break; | |
9f1d377b | 3180 | |
1a2dff53 ILT |
3181 | Output_section* pos = (*p)->output_section(); |
3182 | if (!pos->is_relro() | |
3183 | || (os->is_relro_local() && !pos->is_relro_local()) | |
3184 | || (!os->is_last_relro() && pos->is_last_relro())) | |
3185 | break; | |
3186 | } | |
3187 | ||
3188 | pdl->insert(p, os); | |
3189 | return; | |
9f1d377b ILT |
3190 | } |
3191 | ||
1a2dff53 ILT |
3192 | // One section may be marked as the first section which follows |
3193 | // the relro sections. | |
3194 | if (os->is_first_non_relro()) | |
3195 | { | |
3196 | gold_assert(pdl == &this->output_data_); | |
3197 | Output_segment::Output_data_list::iterator p; | |
3198 | for (p = pdl->begin(); p != pdl->end(); ++p) | |
3199 | { | |
3200 | if (!(*p)->is_section()) | |
3201 | break; | |
3202 | ||
3203 | Output_section* pos = (*p)->output_section(); | |
3204 | if (!pos->is_relro()) | |
3205 | break; | |
3206 | } | |
3207 | ||
3208 | pdl->insert(p, os); | |
3209 | return; | |
3210 | } | |
9f1d377b ILT |
3211 | } |
3212 | ||
8a5e3e08 ILT |
3213 | // Small data sections go at the end of the list of data sections. |
3214 | // If OS is not small, and there are small sections, we have to | |
3215 | // insert it before the first small section. | |
3216 | if (os->type() != elfcpp::SHT_NOBITS | |
3217 | && !os->is_small_section() | |
3218 | && !pdl->empty() | |
3219 | && pdl->back()->is_section() | |
3220 | && pdl->back()->output_section()->is_small_section()) | |
3221 | { | |
3222 | for (Output_segment::Output_data_list::iterator p = pdl->begin(); | |
3223 | p != pdl->end(); | |
3224 | ++p) | |
3225 | { | |
3226 | if ((*p)->is_section() | |
3227 | && (*p)->output_section()->is_small_section()) | |
3228 | { | |
3229 | pdl->insert(p, os); | |
3230 | return; | |
3231 | } | |
3232 | } | |
3233 | gold_unreachable(); | |
3234 | } | |
3235 | ||
3236 | // A small BSS section goes at the start of the BSS sections, after | |
3237 | // other small BSS sections. | |
3238 | if (os->type() == elfcpp::SHT_NOBITS && os->is_small_section()) | |
3239 | { | |
3240 | for (Output_segment::Output_data_list::iterator p = pdl->begin(); | |
3241 | p != pdl->end(); | |
3242 | ++p) | |
3243 | { | |
3244 | if (!(*p)->is_section() | |
3245 | || !(*p)->output_section()->is_small_section()) | |
3246 | { | |
3247 | pdl->insert(p, os); | |
3248 | return; | |
3249 | } | |
3250 | } | |
3251 | } | |
3252 | ||
3253 | // A large BSS section goes at the end of the BSS sections, which | |
3254 | // means that one that is not large must come before the first large | |
3255 | // one. | |
3256 | if (os->type() == elfcpp::SHT_NOBITS | |
3257 | && !os->is_large_section() | |
3258 | && !pdl->empty() | |
3259 | && pdl->back()->is_section() | |
3260 | && pdl->back()->output_section()->is_large_section()) | |
3261 | { | |
3262 | for (Output_segment::Output_data_list::iterator p = pdl->begin(); | |
3263 | p != pdl->end(); | |
3264 | ++p) | |
3265 | { | |
3266 | if ((*p)->is_section() | |
3267 | && (*p)->output_section()->is_large_section()) | |
3268 | { | |
3269 | pdl->insert(p, os); | |
3270 | return; | |
3271 | } | |
3272 | } | |
3273 | gold_unreachable(); | |
3274 | } | |
3275 | ||
f5c870d2 ILT |
3276 | // We do some further output section sorting in order to make the |
3277 | // generated program run more efficiently. We should only do this | |
3278 | // when not using a linker script, so it is controled by the DO_SORT | |
3279 | // parameter. | |
3280 | if (do_sort) | |
3281 | { | |
3282 | // FreeBSD requires the .interp section to be in the first page | |
3283 | // of the executable. That is a more efficient location anyhow | |
3284 | // for any OS, since it means that the kernel will have the data | |
3285 | // handy after it reads the program headers. | |
3286 | if (os->is_interp() && !pdl->empty()) | |
3287 | { | |
3288 | pdl->insert(pdl->begin(), os); | |
3289 | return; | |
3290 | } | |
3291 | ||
3292 | // Put loadable non-writable notes immediately after the .interp | |
3293 | // sections, so that the PT_NOTE segment is on the first page of | |
3294 | // the executable. | |
3295 | if (os->type() == elfcpp::SHT_NOTE | |
3296 | && (os->flags() & elfcpp::SHF_WRITE) == 0 | |
3297 | && !pdl->empty()) | |
3298 | { | |
3299 | Output_segment::Output_data_list::iterator p = pdl->begin(); | |
3300 | if ((*p)->is_section() && (*p)->output_section()->is_interp()) | |
3301 | ++p; | |
3302 | pdl->insert(p, os); | |
96a0d71b | 3303 | return; |
f5c870d2 ILT |
3304 | } |
3305 | ||
3306 | // If this section is used by the dynamic linker, and it is not | |
3307 | // writable, then put it first, after the .interp section and | |
3308 | // any loadable notes. This makes it more likely that the | |
3309 | // dynamic linker will have to read less data from the disk. | |
3310 | if (os->is_dynamic_linker_section() | |
3311 | && !pdl->empty() | |
3312 | && (os->flags() & elfcpp::SHF_WRITE) == 0) | |
3313 | { | |
3314 | bool is_reloc = (os->type() == elfcpp::SHT_REL | |
3315 | || os->type() == elfcpp::SHT_RELA); | |
3316 | Output_segment::Output_data_list::iterator p = pdl->begin(); | |
3317 | while (p != pdl->end() | |
3318 | && (*p)->is_section() | |
3319 | && ((*p)->output_section()->is_dynamic_linker_section() | |
3320 | || (*p)->output_section()->type() == elfcpp::SHT_NOTE)) | |
3321 | { | |
3322 | // Put reloc sections after the other ones. Putting the | |
3323 | // dynamic reloc sections first confuses BFD, notably | |
3324 | // objcopy and strip. | |
3325 | if (!is_reloc | |
3326 | && ((*p)->output_section()->type() == elfcpp::SHT_REL | |
3327 | || (*p)->output_section()->type() == elfcpp::SHT_RELA)) | |
3328 | break; | |
3329 | ++p; | |
3330 | } | |
3331 | pdl->insert(p, os); | |
3332 | return; | |
3333 | } | |
3334 | } | |
3335 | ||
3336 | // If there were no constraints on the output section, just add it | |
3337 | // to the end of the list. | |
01676dcd | 3338 | pdl->push_back(os); |
75f65a3e ILT |
3339 | } |
3340 | ||
1650c4ff ILT |
3341 | // Remove an Output_section from this segment. It is an error if it |
3342 | // is not present. | |
3343 | ||
3344 | void | |
3345 | Output_segment::remove_output_section(Output_section* os) | |
3346 | { | |
3347 | // We only need this for SHT_PROGBITS. | |
3348 | gold_assert(os->type() == elfcpp::SHT_PROGBITS); | |
3349 | for (Output_data_list::iterator p = this->output_data_.begin(); | |
3350 | p != this->output_data_.end(); | |
3351 | ++p) | |
3352 | { | |
3353 | if (*p == os) | |
3354 | { | |
3355 | this->output_data_.erase(p); | |
3356 | return; | |
3357 | } | |
3358 | } | |
3359 | gold_unreachable(); | |
3360 | } | |
3361 | ||
a192ba05 ILT |
3362 | // Add an Output_data (which need not be an Output_section) to the |
3363 | // start of a segment. | |
75f65a3e ILT |
3364 | |
3365 | void | |
3366 | Output_segment::add_initial_output_data(Output_data* od) | |
3367 | { | |
a445fddf | 3368 | gold_assert(!this->is_max_align_known_); |
75f65a3e ILT |
3369 | this->output_data_.push_front(od); |
3370 | } | |
3371 | ||
9f1d377b ILT |
3372 | // Return whether the first data section is a relro section. |
3373 | ||
3374 | bool | |
3375 | Output_segment::is_first_section_relro() const | |
3376 | { | |
3377 | return (!this->output_data_.empty() | |
3378 | && this->output_data_.front()->is_section() | |
3379 | && this->output_data_.front()->output_section()->is_relro()); | |
3380 | } | |
3381 | ||
75f65a3e | 3382 | // Return the maximum alignment of the Output_data in Output_segment. |
75f65a3e ILT |
3383 | |
3384 | uint64_t | |
a445fddf | 3385 | Output_segment::maximum_alignment() |
75f65a3e | 3386 | { |
a445fddf | 3387 | if (!this->is_max_align_known_) |
ead1e424 | 3388 | { |
2ea97941 | 3389 | uint64_t addralign; |
ead1e424 | 3390 | |
2ea97941 ILT |
3391 | addralign = Output_segment::maximum_alignment_list(&this->output_data_); |
3392 | if (addralign > this->max_align_) | |
3393 | this->max_align_ = addralign; | |
ead1e424 | 3394 | |
2ea97941 ILT |
3395 | addralign = Output_segment::maximum_alignment_list(&this->output_bss_); |
3396 | if (addralign > this->max_align_) | |
3397 | this->max_align_ = addralign; | |
ead1e424 | 3398 | |
a445fddf | 3399 | this->is_max_align_known_ = true; |
ead1e424 ILT |
3400 | } |
3401 | ||
a445fddf | 3402 | return this->max_align_; |
75f65a3e ILT |
3403 | } |
3404 | ||
ead1e424 ILT |
3405 | // Return the maximum alignment of a list of Output_data. |
3406 | ||
3407 | uint64_t | |
a445fddf | 3408 | Output_segment::maximum_alignment_list(const Output_data_list* pdl) |
ead1e424 ILT |
3409 | { |
3410 | uint64_t ret = 0; | |
3411 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3412 | p != pdl->end(); | |
3413 | ++p) | |
3414 | { | |
2ea97941 ILT |
3415 | uint64_t addralign = (*p)->addralign(); |
3416 | if (addralign > ret) | |
3417 | ret = addralign; | |
ead1e424 ILT |
3418 | } |
3419 | return ret; | |
3420 | } | |
3421 | ||
4f4c5f80 ILT |
3422 | // Return the number of dynamic relocs applied to this segment. |
3423 | ||
3424 | unsigned int | |
3425 | Output_segment::dynamic_reloc_count() const | |
3426 | { | |
3427 | return (this->dynamic_reloc_count_list(&this->output_data_) | |
3428 | + this->dynamic_reloc_count_list(&this->output_bss_)); | |
3429 | } | |
3430 | ||
3431 | // Return the number of dynamic relocs applied to an Output_data_list. | |
3432 | ||
3433 | unsigned int | |
3434 | Output_segment::dynamic_reloc_count_list(const Output_data_list* pdl) const | |
3435 | { | |
3436 | unsigned int count = 0; | |
3437 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3438 | p != pdl->end(); | |
3439 | ++p) | |
3440 | count += (*p)->dynamic_reloc_count(); | |
3441 | return count; | |
3442 | } | |
3443 | ||
a445fddf ILT |
3444 | // Set the section addresses for an Output_segment. If RESET is true, |
3445 | // reset the addresses first. ADDR is the address and *POFF is the | |
3446 | // file offset. Set the section indexes starting with *PSHNDX. | |
3447 | // Return the address of the immediately following segment. Update | |
3448 | // *POFF and *PSHNDX. | |
75f65a3e ILT |
3449 | |
3450 | uint64_t | |
96a2b4e4 | 3451 | Output_segment::set_section_addresses(const Layout* layout, bool reset, |
1a2dff53 ILT |
3452 | uint64_t addr, |
3453 | unsigned int increase_relro, | |
3454 | off_t* poff, | |
ead1e424 | 3455 | unsigned int* pshndx) |
75f65a3e | 3456 | { |
a3ad94ed | 3457 | gold_assert(this->type_ == elfcpp::PT_LOAD); |
75f65a3e | 3458 | |
1a2dff53 ILT |
3459 | off_t orig_off = *poff; |
3460 | ||
3461 | // If we have relro sections, we need to pad forward now so that the | |
3462 | // relro sections plus INCREASE_RELRO end on a common page boundary. | |
3463 | if (parameters->options().relro() | |
3464 | && this->is_first_section_relro() | |
3465 | && (!this->are_addresses_set_ || reset)) | |
3466 | { | |
3467 | uint64_t relro_size = 0; | |
3468 | off_t off = *poff; | |
3469 | for (Output_data_list::iterator p = this->output_data_.begin(); | |
3470 | p != this->output_data_.end(); | |
3471 | ++p) | |
3472 | { | |
3473 | if (!(*p)->is_section()) | |
3474 | break; | |
3475 | Output_section* pos = (*p)->output_section(); | |
3476 | if (!pos->is_relro()) | |
3477 | break; | |
3478 | gold_assert(!(*p)->is_section_flag_set(elfcpp::SHF_TLS)); | |
3479 | if ((*p)->is_address_valid()) | |
3480 | relro_size += (*p)->data_size(); | |
3481 | else | |
3482 | { | |
3483 | // FIXME: This could be faster. | |
3484 | (*p)->set_address_and_file_offset(addr + relro_size, | |
3485 | off + relro_size); | |
3486 | relro_size += (*p)->data_size(); | |
3487 | (*p)->reset_address_and_file_offset(); | |
3488 | } | |
3489 | } | |
3490 | relro_size += increase_relro; | |
3491 | ||
3492 | uint64_t page_align = parameters->target().common_pagesize(); | |
3493 | ||
3494 | // Align to offset N such that (N + RELRO_SIZE) % PAGE_ALIGN == 0. | |
3495 | uint64_t desired_align = page_align - (relro_size % page_align); | |
3496 | if (desired_align < *poff % page_align) | |
3497 | *poff += page_align - *poff % page_align; | |
3498 | *poff += desired_align - *poff % page_align; | |
3499 | addr += *poff - orig_off; | |
3500 | orig_off = *poff; | |
3501 | } | |
3502 | ||
a445fddf ILT |
3503 | if (!reset && this->are_addresses_set_) |
3504 | { | |
3505 | gold_assert(this->paddr_ == addr); | |
3506 | addr = this->vaddr_; | |
3507 | } | |
3508 | else | |
3509 | { | |
3510 | this->vaddr_ = addr; | |
3511 | this->paddr_ = addr; | |
3512 | this->are_addresses_set_ = true; | |
3513 | } | |
75f65a3e | 3514 | |
96a2b4e4 ILT |
3515 | bool in_tls = false; |
3516 | ||
75f65a3e ILT |
3517 | this->offset_ = orig_off; |
3518 | ||
96a2b4e4 | 3519 | addr = this->set_section_list_addresses(layout, reset, &this->output_data_, |
1a2dff53 | 3520 | addr, poff, pshndx, &in_tls); |
75f65a3e ILT |
3521 | this->filesz_ = *poff - orig_off; |
3522 | ||
3523 | off_t off = *poff; | |
3524 | ||
96a2b4e4 ILT |
3525 | uint64_t ret = this->set_section_list_addresses(layout, reset, |
3526 | &this->output_bss_, | |
3527 | addr, poff, pshndx, | |
1a2dff53 | 3528 | &in_tls); |
96a2b4e4 ILT |
3529 | |
3530 | // If the last section was a TLS section, align upward to the | |
3531 | // alignment of the TLS segment, so that the overall size of the TLS | |
3532 | // segment is aligned. | |
3533 | if (in_tls) | |
3534 | { | |
3535 | uint64_t segment_align = layout->tls_segment()->maximum_alignment(); | |
3536 | *poff = align_address(*poff, segment_align); | |
3537 | } | |
3538 | ||
75f65a3e ILT |
3539 | this->memsz_ = *poff - orig_off; |
3540 | ||
3541 | // Ignore the file offset adjustments made by the BSS Output_data | |
3542 | // objects. | |
3543 | *poff = off; | |
61ba1cf9 ILT |
3544 | |
3545 | return ret; | |
75f65a3e ILT |
3546 | } |
3547 | ||
b8e6aad9 ILT |
3548 | // Set the addresses and file offsets in a list of Output_data |
3549 | // structures. | |
75f65a3e ILT |
3550 | |
3551 | uint64_t | |
96a2b4e4 ILT |
3552 | Output_segment::set_section_list_addresses(const Layout* layout, bool reset, |
3553 | Output_data_list* pdl, | |
ead1e424 | 3554 | uint64_t addr, off_t* poff, |
96a2b4e4 | 3555 | unsigned int* pshndx, |
1a2dff53 | 3556 | bool* in_tls) |
75f65a3e | 3557 | { |
ead1e424 | 3558 | off_t startoff = *poff; |
75f65a3e | 3559 | |
ead1e424 | 3560 | off_t off = startoff; |
75f65a3e ILT |
3561 | for (Output_data_list::iterator p = pdl->begin(); |
3562 | p != pdl->end(); | |
3563 | ++p) | |
3564 | { | |
a445fddf ILT |
3565 | if (reset) |
3566 | (*p)->reset_address_and_file_offset(); | |
3567 | ||
3568 | // When using a linker script the section will most likely | |
3569 | // already have an address. | |
3570 | if (!(*p)->is_address_valid()) | |
3802b2dd | 3571 | { |
96a2b4e4 ILT |
3572 | uint64_t align = (*p)->addralign(); |
3573 | ||
3574 | if ((*p)->is_section_flag_set(elfcpp::SHF_TLS)) | |
3575 | { | |
3576 | // Give the first TLS section the alignment of the | |
3577 | // entire TLS segment. Otherwise the TLS segment as a | |
3578 | // whole may be misaligned. | |
3579 | if (!*in_tls) | |
3580 | { | |
3581 | Output_segment* tls_segment = layout->tls_segment(); | |
3582 | gold_assert(tls_segment != NULL); | |
3583 | uint64_t segment_align = tls_segment->maximum_alignment(); | |
3584 | gold_assert(segment_align >= align); | |
3585 | align = segment_align; | |
3586 | ||
3587 | *in_tls = true; | |
3588 | } | |
3589 | } | |
3590 | else | |
3591 | { | |
3592 | // If this is the first section after the TLS segment, | |
3593 | // align it to at least the alignment of the TLS | |
3594 | // segment, so that the size of the overall TLS segment | |
3595 | // is aligned. | |
3596 | if (*in_tls) | |
3597 | { | |
3598 | uint64_t segment_align = | |
3599 | layout->tls_segment()->maximum_alignment(); | |
3600 | if (segment_align > align) | |
3601 | align = segment_align; | |
3602 | ||
3603 | *in_tls = false; | |
3604 | } | |
3605 | } | |
3606 | ||
3607 | off = align_address(off, align); | |
3802b2dd ILT |
3608 | (*p)->set_address_and_file_offset(addr + (off - startoff), off); |
3609 | } | |
a445fddf ILT |
3610 | else |
3611 | { | |
3612 | // The script may have inserted a skip forward, but it | |
3613 | // better not have moved backward. | |
661be1e2 ILT |
3614 | if ((*p)->address() >= addr + (off - startoff)) |
3615 | off += (*p)->address() - (addr + (off - startoff)); | |
3616 | else | |
3617 | { | |
3618 | if (!layout->script_options()->saw_sections_clause()) | |
3619 | gold_unreachable(); | |
3620 | else | |
3621 | { | |
3622 | Output_section* os = (*p)->output_section(); | |
64b1ae37 DK |
3623 | |
3624 | // Cast to unsigned long long to avoid format warnings. | |
3625 | unsigned long long previous_dot = | |
3626 | static_cast<unsigned long long>(addr + (off - startoff)); | |
3627 | unsigned long long dot = | |
3628 | static_cast<unsigned long long>((*p)->address()); | |
3629 | ||
661be1e2 ILT |
3630 | if (os == NULL) |
3631 | gold_error(_("dot moves backward in linker script " | |
64b1ae37 | 3632 | "from 0x%llx to 0x%llx"), previous_dot, dot); |
661be1e2 ILT |
3633 | else |
3634 | gold_error(_("address of section '%s' moves backward " | |
3635 | "from 0x%llx to 0x%llx"), | |
64b1ae37 | 3636 | os->name(), previous_dot, dot); |
661be1e2 ILT |
3637 | } |
3638 | } | |
a445fddf ILT |
3639 | (*p)->set_file_offset(off); |
3640 | (*p)->finalize_data_size(); | |
3641 | } | |
ead1e424 | 3642 | |
96a2b4e4 ILT |
3643 | // We want to ignore the size of a SHF_TLS or SHT_NOBITS |
3644 | // section. Such a section does not affect the size of a | |
3645 | // PT_LOAD segment. | |
3646 | if (!(*p)->is_section_flag_set(elfcpp::SHF_TLS) | |
ead1e424 ILT |
3647 | || !(*p)->is_section_type(elfcpp::SHT_NOBITS)) |
3648 | off += (*p)->data_size(); | |
75f65a3e | 3649 | |
ead1e424 ILT |
3650 | if ((*p)->is_section()) |
3651 | { | |
3652 | (*p)->set_out_shndx(*pshndx); | |
3653 | ++*pshndx; | |
3654 | } | |
75f65a3e ILT |
3655 | } |
3656 | ||
3657 | *poff = off; | |
ead1e424 | 3658 | return addr + (off - startoff); |
75f65a3e ILT |
3659 | } |
3660 | ||
3661 | // For a non-PT_LOAD segment, set the offset from the sections, if | |
1a2dff53 | 3662 | // any. Add INCREASE to the file size and the memory size. |
75f65a3e ILT |
3663 | |
3664 | void | |
1a2dff53 | 3665 | Output_segment::set_offset(unsigned int increase) |
75f65a3e | 3666 | { |
a3ad94ed | 3667 | gold_assert(this->type_ != elfcpp::PT_LOAD); |
75f65a3e | 3668 | |
a445fddf ILT |
3669 | gold_assert(!this->are_addresses_set_); |
3670 | ||
75f65a3e ILT |
3671 | if (this->output_data_.empty() && this->output_bss_.empty()) |
3672 | { | |
1a2dff53 | 3673 | gold_assert(increase == 0); |
75f65a3e ILT |
3674 | this->vaddr_ = 0; |
3675 | this->paddr_ = 0; | |
a445fddf | 3676 | this->are_addresses_set_ = true; |
75f65a3e | 3677 | this->memsz_ = 0; |
a445fddf | 3678 | this->min_p_align_ = 0; |
75f65a3e ILT |
3679 | this->offset_ = 0; |
3680 | this->filesz_ = 0; | |
3681 | return; | |
3682 | } | |
3683 | ||
3684 | const Output_data* first; | |
3685 | if (this->output_data_.empty()) | |
3686 | first = this->output_bss_.front(); | |
3687 | else | |
3688 | first = this->output_data_.front(); | |
3689 | this->vaddr_ = first->address(); | |
a445fddf ILT |
3690 | this->paddr_ = (first->has_load_address() |
3691 | ? first->load_address() | |
3692 | : this->vaddr_); | |
3693 | this->are_addresses_set_ = true; | |
75f65a3e ILT |
3694 | this->offset_ = first->offset(); |
3695 | ||
3696 | if (this->output_data_.empty()) | |
3697 | this->filesz_ = 0; | |
3698 | else | |
3699 | { | |
3700 | const Output_data* last_data = this->output_data_.back(); | |
3701 | this->filesz_ = (last_data->address() | |
3702 | + last_data->data_size() | |
3703 | - this->vaddr_); | |
3704 | } | |
3705 | ||
3706 | const Output_data* last; | |
3707 | if (this->output_bss_.empty()) | |
3708 | last = this->output_data_.back(); | |
3709 | else | |
3710 | last = this->output_bss_.back(); | |
3711 | this->memsz_ = (last->address() | |
3712 | + last->data_size() | |
3713 | - this->vaddr_); | |
96a2b4e4 | 3714 | |
1a2dff53 ILT |
3715 | this->filesz_ += increase; |
3716 | this->memsz_ += increase; | |
3717 | ||
96a2b4e4 ILT |
3718 | // If this is a TLS segment, align the memory size. The code in |
3719 | // set_section_list ensures that the section after the TLS segment | |
3720 | // is aligned to give us room. | |
3721 | if (this->type_ == elfcpp::PT_TLS) | |
3722 | { | |
3723 | uint64_t segment_align = this->maximum_alignment(); | |
3724 | gold_assert(this->vaddr_ == align_address(this->vaddr_, segment_align)); | |
3725 | this->memsz_ = align_address(this->memsz_, segment_align); | |
3726 | } | |
75f65a3e ILT |
3727 | } |
3728 | ||
7bf1f802 ILT |
3729 | // Set the TLS offsets of the sections in the PT_TLS segment. |
3730 | ||
3731 | void | |
3732 | Output_segment::set_tls_offsets() | |
3733 | { | |
3734 | gold_assert(this->type_ == elfcpp::PT_TLS); | |
3735 | ||
3736 | for (Output_data_list::iterator p = this->output_data_.begin(); | |
3737 | p != this->output_data_.end(); | |
3738 | ++p) | |
3739 | (*p)->set_tls_offset(this->vaddr_); | |
3740 | ||
3741 | for (Output_data_list::iterator p = this->output_bss_.begin(); | |
3742 | p != this->output_bss_.end(); | |
3743 | ++p) | |
3744 | (*p)->set_tls_offset(this->vaddr_); | |
3745 | } | |
3746 | ||
a445fddf ILT |
3747 | // Return the address of the first section. |
3748 | ||
3749 | uint64_t | |
3750 | Output_segment::first_section_load_address() const | |
3751 | { | |
3752 | for (Output_data_list::const_iterator p = this->output_data_.begin(); | |
3753 | p != this->output_data_.end(); | |
3754 | ++p) | |
3755 | if ((*p)->is_section()) | |
3756 | return (*p)->has_load_address() ? (*p)->load_address() : (*p)->address(); | |
3757 | ||
3758 | for (Output_data_list::const_iterator p = this->output_bss_.begin(); | |
3759 | p != this->output_bss_.end(); | |
3760 | ++p) | |
3761 | if ((*p)->is_section()) | |
3762 | return (*p)->has_load_address() ? (*p)->load_address() : (*p)->address(); | |
3763 | ||
3764 | gold_unreachable(); | |
3765 | } | |
3766 | ||
75f65a3e ILT |
3767 | // Return the number of Output_sections in an Output_segment. |
3768 | ||
3769 | unsigned int | |
3770 | Output_segment::output_section_count() const | |
3771 | { | |
3772 | return (this->output_section_count_list(&this->output_data_) | |
3773 | + this->output_section_count_list(&this->output_bss_)); | |
3774 | } | |
3775 | ||
3776 | // Return the number of Output_sections in an Output_data_list. | |
3777 | ||
3778 | unsigned int | |
3779 | Output_segment::output_section_count_list(const Output_data_list* pdl) const | |
3780 | { | |
3781 | unsigned int count = 0; | |
3782 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3783 | p != pdl->end(); | |
3784 | ++p) | |
3785 | { | |
3786 | if ((*p)->is_section()) | |
3787 | ++count; | |
3788 | } | |
3789 | return count; | |
a2fb1b05 ILT |
3790 | } |
3791 | ||
1c4f3631 ILT |
3792 | // Return the section attached to the list segment with the lowest |
3793 | // load address. This is used when handling a PHDRS clause in a | |
3794 | // linker script. | |
3795 | ||
3796 | Output_section* | |
3797 | Output_segment::section_with_lowest_load_address() const | |
3798 | { | |
3799 | Output_section* found = NULL; | |
3800 | uint64_t found_lma = 0; | |
3801 | this->lowest_load_address_in_list(&this->output_data_, &found, &found_lma); | |
3802 | ||
3803 | Output_section* found_data = found; | |
3804 | this->lowest_load_address_in_list(&this->output_bss_, &found, &found_lma); | |
3805 | if (found != found_data && found_data != NULL) | |
3806 | { | |
3807 | gold_error(_("nobits section %s may not precede progbits section %s " | |
3808 | "in same segment"), | |
3809 | found->name(), found_data->name()); | |
3810 | return NULL; | |
3811 | } | |
3812 | ||
3813 | return found; | |
3814 | } | |
3815 | ||
3816 | // Look through a list for a section with a lower load address. | |
3817 | ||
3818 | void | |
3819 | Output_segment::lowest_load_address_in_list(const Output_data_list* pdl, | |
3820 | Output_section** found, | |
3821 | uint64_t* found_lma) const | |
3822 | { | |
3823 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3824 | p != pdl->end(); | |
3825 | ++p) | |
3826 | { | |
3827 | if (!(*p)->is_section()) | |
3828 | continue; | |
3829 | Output_section* os = static_cast<Output_section*>(*p); | |
3830 | uint64_t lma = (os->has_load_address() | |
3831 | ? os->load_address() | |
3832 | : os->address()); | |
3833 | if (*found == NULL || lma < *found_lma) | |
3834 | { | |
3835 | *found = os; | |
3836 | *found_lma = lma; | |
3837 | } | |
3838 | } | |
3839 | } | |
3840 | ||
61ba1cf9 ILT |
3841 | // Write the segment data into *OPHDR. |
3842 | ||
3843 | template<int size, bool big_endian> | |
3844 | void | |
ead1e424 | 3845 | Output_segment::write_header(elfcpp::Phdr_write<size, big_endian>* ophdr) |
61ba1cf9 ILT |
3846 | { |
3847 | ophdr->put_p_type(this->type_); | |
3848 | ophdr->put_p_offset(this->offset_); | |
3849 | ophdr->put_p_vaddr(this->vaddr_); | |
3850 | ophdr->put_p_paddr(this->paddr_); | |
3851 | ophdr->put_p_filesz(this->filesz_); | |
3852 | ophdr->put_p_memsz(this->memsz_); | |
3853 | ophdr->put_p_flags(this->flags_); | |
a445fddf | 3854 | ophdr->put_p_align(std::max(this->min_p_align_, this->maximum_alignment())); |
61ba1cf9 ILT |
3855 | } |
3856 | ||
3857 | // Write the section headers into V. | |
3858 | ||
3859 | template<int size, bool big_endian> | |
3860 | unsigned char* | |
16649710 ILT |
3861 | Output_segment::write_section_headers(const Layout* layout, |
3862 | const Stringpool* secnamepool, | |
ead1e424 | 3863 | unsigned char* v, |
7d1a9ebb | 3864 | unsigned int *pshndx) const |
5482377d | 3865 | { |
ead1e424 ILT |
3866 | // Every section that is attached to a segment must be attached to a |
3867 | // PT_LOAD segment, so we only write out section headers for PT_LOAD | |
3868 | // segments. | |
3869 | if (this->type_ != elfcpp::PT_LOAD) | |
3870 | return v; | |
3871 | ||
7d1a9ebb ILT |
3872 | v = this->write_section_headers_list<size, big_endian>(layout, secnamepool, |
3873 | &this->output_data_, | |
3874 | v, pshndx); | |
3875 | v = this->write_section_headers_list<size, big_endian>(layout, secnamepool, | |
3876 | &this->output_bss_, | |
3877 | v, pshndx); | |
61ba1cf9 ILT |
3878 | return v; |
3879 | } | |
3880 | ||
3881 | template<int size, bool big_endian> | |
3882 | unsigned char* | |
16649710 ILT |
3883 | Output_segment::write_section_headers_list(const Layout* layout, |
3884 | const Stringpool* secnamepool, | |
61ba1cf9 | 3885 | const Output_data_list* pdl, |
ead1e424 | 3886 | unsigned char* v, |
7d1a9ebb | 3887 | unsigned int* pshndx) const |
61ba1cf9 ILT |
3888 | { |
3889 | const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
3890 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3891 | p != pdl->end(); | |
3892 | ++p) | |
3893 | { | |
3894 | if ((*p)->is_section()) | |
3895 | { | |
5482377d | 3896 | const Output_section* ps = static_cast<const Output_section*>(*p); |
a3ad94ed | 3897 | gold_assert(*pshndx == ps->out_shndx()); |
61ba1cf9 | 3898 | elfcpp::Shdr_write<size, big_endian> oshdr(v); |
16649710 | 3899 | ps->write_header(layout, secnamepool, &oshdr); |
61ba1cf9 | 3900 | v += shdr_size; |
ead1e424 | 3901 | ++*pshndx; |
61ba1cf9 ILT |
3902 | } |
3903 | } | |
3904 | return v; | |
3905 | } | |
3906 | ||
7d9e3d98 ILT |
3907 | // Print the output sections to the map file. |
3908 | ||
3909 | void | |
3910 | Output_segment::print_sections_to_mapfile(Mapfile* mapfile) const | |
3911 | { | |
3912 | if (this->type() != elfcpp::PT_LOAD) | |
3913 | return; | |
3914 | this->print_section_list_to_mapfile(mapfile, &this->output_data_); | |
3915 | this->print_section_list_to_mapfile(mapfile, &this->output_bss_); | |
3916 | } | |
3917 | ||
3918 | // Print an output section list to the map file. | |
3919 | ||
3920 | void | |
3921 | Output_segment::print_section_list_to_mapfile(Mapfile* mapfile, | |
3922 | const Output_data_list* pdl) const | |
3923 | { | |
3924 | for (Output_data_list::const_iterator p = pdl->begin(); | |
3925 | p != pdl->end(); | |
3926 | ++p) | |
3927 | (*p)->print_to_mapfile(mapfile); | |
3928 | } | |
3929 | ||
a2fb1b05 ILT |
3930 | // Output_file methods. |
3931 | ||
14144f39 ILT |
3932 | Output_file::Output_file(const char* name) |
3933 | : name_(name), | |
61ba1cf9 ILT |
3934 | o_(-1), |
3935 | file_size_(0), | |
c420411f | 3936 | base_(NULL), |
516cb3d0 ILT |
3937 | map_is_anonymous_(false), |
3938 | is_temporary_(false) | |
61ba1cf9 ILT |
3939 | { |
3940 | } | |
3941 | ||
404c2abb ILT |
3942 | // Try to open an existing file. Returns false if the file doesn't |
3943 | // exist, has a size of 0 or can't be mmapped. | |
3944 | ||
3945 | bool | |
3946 | Output_file::open_for_modification() | |
3947 | { | |
3948 | // The name "-" means "stdout". | |
3949 | if (strcmp(this->name_, "-") == 0) | |
3950 | return false; | |
3951 | ||
3952 | // Don't bother opening files with a size of zero. | |
3953 | struct stat s; | |
3954 | if (::stat(this->name_, &s) != 0 || s.st_size == 0) | |
3955 | return false; | |
3956 | ||
3957 | int o = open_descriptor(-1, this->name_, O_RDWR, 0); | |
3958 | if (o < 0) | |
3959 | gold_fatal(_("%s: open: %s"), this->name_, strerror(errno)); | |
3960 | this->o_ = o; | |
3961 | this->file_size_ = s.st_size; | |
3962 | ||
3963 | // If the file can't be mmapped, copying the content to an anonymous | |
3964 | // map will probably negate the performance benefits of incremental | |
3965 | // linking. This could be helped by using views and loading only | |
3966 | // the necessary parts, but this is not supported as of now. | |
3967 | if (!this->map_no_anonymous()) | |
3968 | { | |
3969 | release_descriptor(o, true); | |
3970 | this->o_ = -1; | |
3971 | this->file_size_ = 0; | |
3972 | return false; | |
3973 | } | |
3974 | ||
3975 | return true; | |
3976 | } | |
3977 | ||
61ba1cf9 ILT |
3978 | // Open the output file. |
3979 | ||
a2fb1b05 | 3980 | void |
61ba1cf9 | 3981 | Output_file::open(off_t file_size) |
a2fb1b05 | 3982 | { |
61ba1cf9 ILT |
3983 | this->file_size_ = file_size; |
3984 | ||
4e9d8586 ILT |
3985 | // Unlink the file first; otherwise the open() may fail if the file |
3986 | // is busy (e.g. it's an executable that's currently being executed). | |
3987 | // | |
3988 | // However, the linker may be part of a system where a zero-length | |
3989 | // file is created for it to write to, with tight permissions (gcc | |
3990 | // 2.95 did something like this). Unlinking the file would work | |
3991 | // around those permission controls, so we only unlink if the file | |
3992 | // has a non-zero size. We also unlink only regular files to avoid | |
3993 | // trouble with directories/etc. | |
3994 | // | |
3995 | // If we fail, continue; this command is merely a best-effort attempt | |
3996 | // to improve the odds for open(). | |
3997 | ||
42a1b686 | 3998 | // We let the name "-" mean "stdout" |
516cb3d0 | 3999 | if (!this->is_temporary_) |
42a1b686 | 4000 | { |
516cb3d0 ILT |
4001 | if (strcmp(this->name_, "-") == 0) |
4002 | this->o_ = STDOUT_FILENO; | |
4003 | else | |
4004 | { | |
4005 | struct stat s; | |
6a89f575 CC |
4006 | if (::stat(this->name_, &s) == 0 |
4007 | && (S_ISREG (s.st_mode) || S_ISLNK (s.st_mode))) | |
4008 | { | |
4009 | if (s.st_size != 0) | |
4010 | ::unlink(this->name_); | |
4011 | else if (!parameters->options().relocatable()) | |
4012 | { | |
4013 | // If we don't unlink the existing file, add execute | |
4014 | // permission where read permissions already exist | |
4015 | // and where the umask permits. | |
4016 | int mask = ::umask(0); | |
4017 | ::umask(mask); | |
4018 | s.st_mode |= (s.st_mode & 0444) >> 2; | |
4019 | ::chmod(this->name_, s.st_mode & ~mask); | |
4020 | } | |
4021 | } | |
516cb3d0 | 4022 | |
8851ecca | 4023 | int mode = parameters->options().relocatable() ? 0666 : 0777; |
2a00e4fb ILT |
4024 | int o = open_descriptor(-1, this->name_, O_RDWR | O_CREAT | O_TRUNC, |
4025 | mode); | |
516cb3d0 ILT |
4026 | if (o < 0) |
4027 | gold_fatal(_("%s: open: %s"), this->name_, strerror(errno)); | |
4028 | this->o_ = o; | |
4029 | } | |
42a1b686 | 4030 | } |
61ba1cf9 | 4031 | |
27bc2bce ILT |
4032 | this->map(); |
4033 | } | |
4034 | ||
4035 | // Resize the output file. | |
4036 | ||
4037 | void | |
4038 | Output_file::resize(off_t file_size) | |
4039 | { | |
c420411f ILT |
4040 | // If the mmap is mapping an anonymous memory buffer, this is easy: |
4041 | // just mremap to the new size. If it's mapping to a file, we want | |
4042 | // to unmap to flush to the file, then remap after growing the file. | |
4043 | if (this->map_is_anonymous_) | |
4044 | { | |
4045 | void* base = ::mremap(this->base_, this->file_size_, file_size, | |
4046 | MREMAP_MAYMOVE); | |
4047 | if (base == MAP_FAILED) | |
4048 | gold_fatal(_("%s: mremap: %s"), this->name_, strerror(errno)); | |
4049 | this->base_ = static_cast<unsigned char*>(base); | |
4050 | this->file_size_ = file_size; | |
4051 | } | |
4052 | else | |
4053 | { | |
4054 | this->unmap(); | |
4055 | this->file_size_ = file_size; | |
fdcac5af ILT |
4056 | if (!this->map_no_anonymous()) |
4057 | gold_fatal(_("%s: mmap: %s"), this->name_, strerror(errno)); | |
c420411f | 4058 | } |
27bc2bce ILT |
4059 | } |
4060 | ||
404c2abb ILT |
4061 | // Map an anonymous block of memory which will later be written to the |
4062 | // file. Return whether the map succeeded. | |
26736d8e | 4063 | |
404c2abb | 4064 | bool |
26736d8e ILT |
4065 | Output_file::map_anonymous() |
4066 | { | |
404c2abb ILT |
4067 | void* base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE, |
4068 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
4069 | if (base != MAP_FAILED) | |
4070 | { | |
4071 | this->map_is_anonymous_ = true; | |
4072 | this->base_ = static_cast<unsigned char*>(base); | |
4073 | return true; | |
4074 | } | |
4075 | return false; | |
26736d8e ILT |
4076 | } |
4077 | ||
404c2abb | 4078 | // Map the file into memory. Return whether the mapping succeeded. |
27bc2bce | 4079 | |
404c2abb ILT |
4080 | bool |
4081 | Output_file::map_no_anonymous() | |
27bc2bce | 4082 | { |
c420411f | 4083 | const int o = this->o_; |
61ba1cf9 | 4084 | |
c420411f ILT |
4085 | // If the output file is not a regular file, don't try to mmap it; |
4086 | // instead, we'll mmap a block of memory (an anonymous buffer), and | |
4087 | // then later write the buffer to the file. | |
4088 | void* base; | |
4089 | struct stat statbuf; | |
42a1b686 ILT |
4090 | if (o == STDOUT_FILENO || o == STDERR_FILENO |
4091 | || ::fstat(o, &statbuf) != 0 | |
516cb3d0 ILT |
4092 | || !S_ISREG(statbuf.st_mode) |
4093 | || this->is_temporary_) | |
404c2abb ILT |
4094 | return false; |
4095 | ||
4096 | // Ensure that we have disk space available for the file. If we | |
4097 | // don't do this, it is possible that we will call munmap, close, | |
4098 | // and exit with dirty buffers still in the cache with no assigned | |
4099 | // disk blocks. If the disk is out of space at that point, the | |
4100 | // output file will wind up incomplete, but we will have already | |
4101 | // exited. The alternative to fallocate would be to use fdatasync, | |
4102 | // but that would be a more significant performance hit. | |
4103 | if (::posix_fallocate(o, 0, this->file_size_) < 0) | |
4104 | gold_fatal(_("%s: %s"), this->name_, strerror(errno)); | |
4105 | ||
4106 | // Map the file into memory. | |
4107 | base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE, | |
4108 | MAP_SHARED, o, 0); | |
4109 | ||
4110 | // The mmap call might fail because of file system issues: the file | |
4111 | // system might not support mmap at all, or it might not support | |
4112 | // mmap with PROT_WRITE. | |
61ba1cf9 | 4113 | if (base == MAP_FAILED) |
404c2abb ILT |
4114 | return false; |
4115 | ||
4116 | this->map_is_anonymous_ = false; | |
61ba1cf9 | 4117 | this->base_ = static_cast<unsigned char*>(base); |
404c2abb ILT |
4118 | return true; |
4119 | } | |
4120 | ||
4121 | // Map the file into memory. | |
4122 | ||
4123 | void | |
4124 | Output_file::map() | |
4125 | { | |
4126 | if (this->map_no_anonymous()) | |
4127 | return; | |
4128 | ||
4129 | // The mmap call might fail because of file system issues: the file | |
4130 | // system might not support mmap at all, or it might not support | |
4131 | // mmap with PROT_WRITE. I'm not sure which errno values we will | |
4132 | // see in all cases, so if the mmap fails for any reason and we | |
4133 | // don't care about file contents, try for an anonymous map. | |
4134 | if (this->map_anonymous()) | |
4135 | return; | |
4136 | ||
4137 | gold_fatal(_("%s: mmap: failed to allocate %lu bytes for output file: %s"), | |
4138 | this->name_, static_cast<unsigned long>(this->file_size_), | |
4139 | strerror(errno)); | |
61ba1cf9 ILT |
4140 | } |
4141 | ||
c420411f | 4142 | // Unmap the file from memory. |
61ba1cf9 ILT |
4143 | |
4144 | void | |
c420411f | 4145 | Output_file::unmap() |
61ba1cf9 ILT |
4146 | { |
4147 | if (::munmap(this->base_, this->file_size_) < 0) | |
a0c4fb0a | 4148 | gold_error(_("%s: munmap: %s"), this->name_, strerror(errno)); |
61ba1cf9 | 4149 | this->base_ = NULL; |
c420411f ILT |
4150 | } |
4151 | ||
4152 | // Close the output file. | |
4153 | ||
4154 | void | |
4155 | Output_file::close() | |
4156 | { | |
4157 | // If the map isn't file-backed, we need to write it now. | |
516cb3d0 | 4158 | if (this->map_is_anonymous_ && !this->is_temporary_) |
c420411f ILT |
4159 | { |
4160 | size_t bytes_to_write = this->file_size_; | |
6d1e3092 | 4161 | size_t offset = 0; |
c420411f ILT |
4162 | while (bytes_to_write > 0) |
4163 | { | |
6d1e3092 CD |
4164 | ssize_t bytes_written = ::write(this->o_, this->base_ + offset, |
4165 | bytes_to_write); | |
c420411f ILT |
4166 | if (bytes_written == 0) |
4167 | gold_error(_("%s: write: unexpected 0 return-value"), this->name_); | |
4168 | else if (bytes_written < 0) | |
4169 | gold_error(_("%s: write: %s"), this->name_, strerror(errno)); | |
4170 | else | |
6d1e3092 CD |
4171 | { |
4172 | bytes_to_write -= bytes_written; | |
4173 | offset += bytes_written; | |
4174 | } | |
c420411f ILT |
4175 | } |
4176 | } | |
4177 | this->unmap(); | |
61ba1cf9 | 4178 | |
42a1b686 | 4179 | // We don't close stdout or stderr |
516cb3d0 ILT |
4180 | if (this->o_ != STDOUT_FILENO |
4181 | && this->o_ != STDERR_FILENO | |
4182 | && !this->is_temporary_) | |
42a1b686 ILT |
4183 | if (::close(this->o_) < 0) |
4184 | gold_error(_("%s: close: %s"), this->name_, strerror(errno)); | |
61ba1cf9 | 4185 | this->o_ = -1; |
a2fb1b05 ILT |
4186 | } |
4187 | ||
4188 | // Instantiate the templates we need. We could use the configure | |
4189 | // script to restrict this to only the ones for implemented targets. | |
4190 | ||
193a53d9 | 4191 | #ifdef HAVE_TARGET_32_LITTLE |
a2fb1b05 ILT |
4192 | template |
4193 | off_t | |
4194 | Output_section::add_input_section<32, false>( | |
730cdc88 | 4195 | Sized_relobj<32, false>* object, |
2ea97941 | 4196 | unsigned int shndx, |
a2fb1b05 | 4197 | const char* secname, |
730cdc88 | 4198 | const elfcpp::Shdr<32, false>& shdr, |
a445fddf ILT |
4199 | unsigned int reloc_shndx, |
4200 | bool have_sections_script); | |
193a53d9 | 4201 | #endif |
a2fb1b05 | 4202 | |
193a53d9 | 4203 | #ifdef HAVE_TARGET_32_BIG |
a2fb1b05 ILT |
4204 | template |
4205 | off_t | |
4206 | Output_section::add_input_section<32, true>( | |
730cdc88 | 4207 | Sized_relobj<32, true>* object, |
2ea97941 | 4208 | unsigned int shndx, |
a2fb1b05 | 4209 | const char* secname, |
730cdc88 | 4210 | const elfcpp::Shdr<32, true>& shdr, |
a445fddf ILT |
4211 | unsigned int reloc_shndx, |
4212 | bool have_sections_script); | |
193a53d9 | 4213 | #endif |
a2fb1b05 | 4214 | |
193a53d9 | 4215 | #ifdef HAVE_TARGET_64_LITTLE |
a2fb1b05 ILT |
4216 | template |
4217 | off_t | |
4218 | Output_section::add_input_section<64, false>( | |
730cdc88 | 4219 | Sized_relobj<64, false>* object, |
2ea97941 | 4220 | unsigned int shndx, |
a2fb1b05 | 4221 | const char* secname, |
730cdc88 | 4222 | const elfcpp::Shdr<64, false>& shdr, |
a445fddf ILT |
4223 | unsigned int reloc_shndx, |
4224 | bool have_sections_script); | |
193a53d9 | 4225 | #endif |
a2fb1b05 | 4226 | |
193a53d9 | 4227 | #ifdef HAVE_TARGET_64_BIG |
a2fb1b05 ILT |
4228 | template |
4229 | off_t | |
4230 | Output_section::add_input_section<64, true>( | |
730cdc88 | 4231 | Sized_relobj<64, true>* object, |
2ea97941 | 4232 | unsigned int shndx, |
a2fb1b05 | 4233 | const char* secname, |
730cdc88 | 4234 | const elfcpp::Shdr<64, true>& shdr, |
a445fddf ILT |
4235 | unsigned int reloc_shndx, |
4236 | bool have_sections_script); | |
193a53d9 | 4237 | #endif |
a2fb1b05 | 4238 | |
bbbfea06 CC |
4239 | #ifdef HAVE_TARGET_32_LITTLE |
4240 | template | |
4241 | class Output_reloc<elfcpp::SHT_REL, false, 32, false>; | |
4242 | #endif | |
4243 | ||
4244 | #ifdef HAVE_TARGET_32_BIG | |
4245 | template | |
4246 | class Output_reloc<elfcpp::SHT_REL, false, 32, true>; | |
4247 | #endif | |
4248 | ||
4249 | #ifdef HAVE_TARGET_64_LITTLE | |
4250 | template | |
4251 | class Output_reloc<elfcpp::SHT_REL, false, 64, false>; | |
4252 | #endif | |
4253 | ||
4254 | #ifdef HAVE_TARGET_64_BIG | |
4255 | template | |
4256 | class Output_reloc<elfcpp::SHT_REL, false, 64, true>; | |
4257 | #endif | |
4258 | ||
4259 | #ifdef HAVE_TARGET_32_LITTLE | |
4260 | template | |
4261 | class Output_reloc<elfcpp::SHT_REL, true, 32, false>; | |
4262 | #endif | |
4263 | ||
4264 | #ifdef HAVE_TARGET_32_BIG | |
4265 | template | |
4266 | class Output_reloc<elfcpp::SHT_REL, true, 32, true>; | |
4267 | #endif | |
4268 | ||
4269 | #ifdef HAVE_TARGET_64_LITTLE | |
4270 | template | |
4271 | class Output_reloc<elfcpp::SHT_REL, true, 64, false>; | |
4272 | #endif | |
4273 | ||
4274 | #ifdef HAVE_TARGET_64_BIG | |
4275 | template | |
4276 | class Output_reloc<elfcpp::SHT_REL, true, 64, true>; | |
4277 | #endif | |
4278 | ||
4279 | #ifdef HAVE_TARGET_32_LITTLE | |
4280 | template | |
4281 | class Output_reloc<elfcpp::SHT_RELA, false, 32, false>; | |
4282 | #endif | |
4283 | ||
4284 | #ifdef HAVE_TARGET_32_BIG | |
4285 | template | |
4286 | class Output_reloc<elfcpp::SHT_RELA, false, 32, true>; | |
4287 | #endif | |
4288 | ||
4289 | #ifdef HAVE_TARGET_64_LITTLE | |
4290 | template | |
4291 | class Output_reloc<elfcpp::SHT_RELA, false, 64, false>; | |
4292 | #endif | |
4293 | ||
4294 | #ifdef HAVE_TARGET_64_BIG | |
4295 | template | |
4296 | class Output_reloc<elfcpp::SHT_RELA, false, 64, true>; | |
4297 | #endif | |
4298 | ||
4299 | #ifdef HAVE_TARGET_32_LITTLE | |
4300 | template | |
4301 | class Output_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
4302 | #endif | |
4303 | ||
4304 | #ifdef HAVE_TARGET_32_BIG | |
4305 | template | |
4306 | class Output_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
4307 | #endif | |
4308 | ||
4309 | #ifdef HAVE_TARGET_64_LITTLE | |
4310 | template | |
4311 | class Output_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
4312 | #endif | |
4313 | ||
4314 | #ifdef HAVE_TARGET_64_BIG | |
4315 | template | |
4316 | class Output_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
4317 | #endif | |
4318 | ||
193a53d9 | 4319 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
4320 | template |
4321 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, false>; | |
193a53d9 | 4322 | #endif |
c06b7b0b | 4323 | |
193a53d9 | 4324 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
4325 | template |
4326 | class Output_data_reloc<elfcpp::SHT_REL, false, 32, true>; | |
193a53d9 | 4327 | #endif |
c06b7b0b | 4328 | |
193a53d9 | 4329 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
4330 | template |
4331 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, false>; | |
193a53d9 | 4332 | #endif |
c06b7b0b | 4333 | |
193a53d9 | 4334 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
4335 | template |
4336 | class Output_data_reloc<elfcpp::SHT_REL, false, 64, true>; | |
193a53d9 | 4337 | #endif |
c06b7b0b | 4338 | |
193a53d9 | 4339 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
4340 | template |
4341 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, false>; | |
193a53d9 | 4342 | #endif |
c06b7b0b | 4343 | |
193a53d9 | 4344 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
4345 | template |
4346 | class Output_data_reloc<elfcpp::SHT_REL, true, 32, true>; | |
193a53d9 | 4347 | #endif |
c06b7b0b | 4348 | |
193a53d9 | 4349 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
4350 | template |
4351 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, false>; | |
193a53d9 | 4352 | #endif |
c06b7b0b | 4353 | |
193a53d9 | 4354 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
4355 | template |
4356 | class Output_data_reloc<elfcpp::SHT_REL, true, 64, true>; | |
193a53d9 | 4357 | #endif |
c06b7b0b | 4358 | |
193a53d9 | 4359 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
4360 | template |
4361 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, false>; | |
193a53d9 | 4362 | #endif |
c06b7b0b | 4363 | |
193a53d9 | 4364 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
4365 | template |
4366 | class Output_data_reloc<elfcpp::SHT_RELA, false, 32, true>; | |
193a53d9 | 4367 | #endif |
c06b7b0b | 4368 | |
193a53d9 | 4369 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
4370 | template |
4371 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, false>; | |
193a53d9 | 4372 | #endif |
c06b7b0b | 4373 | |
193a53d9 | 4374 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
4375 | template |
4376 | class Output_data_reloc<elfcpp::SHT_RELA, false, 64, true>; | |
193a53d9 | 4377 | #endif |
c06b7b0b | 4378 | |
193a53d9 | 4379 | #ifdef HAVE_TARGET_32_LITTLE |
c06b7b0b ILT |
4380 | template |
4381 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>; | |
193a53d9 | 4382 | #endif |
c06b7b0b | 4383 | |
193a53d9 | 4384 | #ifdef HAVE_TARGET_32_BIG |
c06b7b0b ILT |
4385 | template |
4386 | class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>; | |
193a53d9 | 4387 | #endif |
c06b7b0b | 4388 | |
193a53d9 | 4389 | #ifdef HAVE_TARGET_64_LITTLE |
c06b7b0b ILT |
4390 | template |
4391 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>; | |
193a53d9 | 4392 | #endif |
c06b7b0b | 4393 | |
193a53d9 | 4394 | #ifdef HAVE_TARGET_64_BIG |
c06b7b0b ILT |
4395 | template |
4396 | class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>; | |
193a53d9 | 4397 | #endif |
c06b7b0b | 4398 | |
6a74a719 ILT |
4399 | #ifdef HAVE_TARGET_32_LITTLE |
4400 | template | |
4401 | class Output_relocatable_relocs<elfcpp::SHT_REL, 32, false>; | |
4402 | #endif | |
4403 | ||
4404 | #ifdef HAVE_TARGET_32_BIG | |
4405 | template | |
4406 | class Output_relocatable_relocs<elfcpp::SHT_REL, 32, true>; | |
4407 | #endif | |
4408 | ||
4409 | #ifdef HAVE_TARGET_64_LITTLE | |
4410 | template | |
4411 | class Output_relocatable_relocs<elfcpp::SHT_REL, 64, false>; | |
4412 | #endif | |
4413 | ||
4414 | #ifdef HAVE_TARGET_64_BIG | |
4415 | template | |
4416 | class Output_relocatable_relocs<elfcpp::SHT_REL, 64, true>; | |
4417 | #endif | |
4418 | ||
4419 | #ifdef HAVE_TARGET_32_LITTLE | |
4420 | template | |
4421 | class Output_relocatable_relocs<elfcpp::SHT_RELA, 32, false>; | |
4422 | #endif | |
4423 | ||
4424 | #ifdef HAVE_TARGET_32_BIG | |
4425 | template | |
4426 | class Output_relocatable_relocs<elfcpp::SHT_RELA, 32, true>; | |
4427 | #endif | |
4428 | ||
4429 | #ifdef HAVE_TARGET_64_LITTLE | |
4430 | template | |
4431 | class Output_relocatable_relocs<elfcpp::SHT_RELA, 64, false>; | |
4432 | #endif | |
4433 | ||
4434 | #ifdef HAVE_TARGET_64_BIG | |
4435 | template | |
4436 | class Output_relocatable_relocs<elfcpp::SHT_RELA, 64, true>; | |
4437 | #endif | |
4438 | ||
4439 | #ifdef HAVE_TARGET_32_LITTLE | |
4440 | template | |
4441 | class Output_data_group<32, false>; | |
4442 | #endif | |
4443 | ||
4444 | #ifdef HAVE_TARGET_32_BIG | |
4445 | template | |
4446 | class Output_data_group<32, true>; | |
4447 | #endif | |
4448 | ||
4449 | #ifdef HAVE_TARGET_64_LITTLE | |
4450 | template | |
4451 | class Output_data_group<64, false>; | |
4452 | #endif | |
4453 | ||
4454 | #ifdef HAVE_TARGET_64_BIG | |
4455 | template | |
4456 | class Output_data_group<64, true>; | |
4457 | #endif | |
4458 | ||
193a53d9 | 4459 | #ifdef HAVE_TARGET_32_LITTLE |
ead1e424 | 4460 | template |
dbe717ef | 4461 | class Output_data_got<32, false>; |
193a53d9 | 4462 | #endif |
ead1e424 | 4463 | |
193a53d9 | 4464 | #ifdef HAVE_TARGET_32_BIG |
ead1e424 | 4465 | template |
dbe717ef | 4466 | class Output_data_got<32, true>; |
193a53d9 | 4467 | #endif |
ead1e424 | 4468 | |
193a53d9 | 4469 | #ifdef HAVE_TARGET_64_LITTLE |
ead1e424 | 4470 | template |
dbe717ef | 4471 | class Output_data_got<64, false>; |
193a53d9 | 4472 | #endif |
ead1e424 | 4473 | |
193a53d9 | 4474 | #ifdef HAVE_TARGET_64_BIG |
ead1e424 | 4475 | template |
dbe717ef | 4476 | class Output_data_got<64, true>; |
193a53d9 | 4477 | #endif |
ead1e424 | 4478 | |
a2fb1b05 | 4479 | } // End namespace gold. |